diff --git a/tests/app/navigation/transition-tests.ts b/tests/app/navigation/transition-tests.ts
index dce7ee3bc..8c7905f4e 100644
--- a/tests/app/navigation/transition-tests.ts
+++ b/tests/app/navigation/transition-tests.ts
@@ -3,13 +3,13 @@ import * as helper from "../ui/helper";
 import * as platform from "platform";
 import * as trace from "trace";
 import {Color} from "color";
-import {NavigationEntry, NavigationTransition, topmost as topmostFrame} from "ui/frame";
+import {NavigationEntry, NavigationTransition, topmost as topmostFrame, traceEnabled} from "ui/frame";
 import {Page} from "ui/page";
 import {AnimationCurve} from "ui/enums"
 
 function _testTransition(navigationTransition: NavigationTransition) {
     var testId = `Transition[${JSON.stringify(navigationTransition)}]`;
-    if (trace.enabled) {
+    if (traceEnabled()) {
         trace.write(`Testing ${testId}`, trace.categories.Test);
     }
     var navigationEntry: NavigationEntry = {
diff --git a/tests/app/trace-tests.ts b/tests/app/trace-tests.ts
index 721ede745..66c1e435d 100644
--- a/tests/app/trace-tests.ts
+++ b/tests/app/trace-tests.ts
@@ -29,7 +29,7 @@ export var test_DummyTestForSnippetOnly2 = function () {
     // >> trace-message
     trace.setCategories(trace.categories.Debug);
     trace.enable();
-    if (trace.enabled) {
+    if (trace.isEnabled()) {
         trace.write("My Debug Message", trace.categories.Debug);
     }
     // << trace-message
diff --git a/tns-core-modules/file-system/file-name-resolver.ts b/tns-core-modules/file-system/file-name-resolver.ts
index 755de8493..1dc60026c 100644
--- a/tns-core-modules/file-system/file-name-resolver.ts
+++ b/tns-core-modules/file-system/file-name-resolver.ts
@@ -142,7 +142,7 @@ export class FileNameResolver implements definition.FileNameResolver {
         var candidates = this.getFileCandidatesFromFolder(path, ext);
         result = _findFileMatch(path, ext, candidates, this._context);
 
-        if (trace.enabled) {
+        if (trace.isEnabled()) {
             trace.write("Resolved file name for \"" + path + ext + "\" result: " + (result ? result : "no match found"), trace.categories.Navigation);
         }
         return result;
@@ -166,7 +166,7 @@ export class FileNameResolver implements definition.FileNameResolver {
             });
         }
         else {
-            if (trace.enabled) {
+            if (trace.isEnabled()) {
                 trace.write("Could not find folder " + folderPath + " when loading " + path + ext, trace.categories.Navigation);
             }
         }
@@ -179,7 +179,7 @@ export function _findFileMatch(path: string, ext: string, candidates: Array<stri
     var bestValue = -1
     var result: string = null;
 
-    if (trace.enabled) {
+    if (trace.isEnabled()) {
         trace.write("Candidates for " + path + ext + ": " + candidates.join(", "), trace.categories.Navigation);
     }
     for (var i = 0; i < candidates.length; i++) {
diff --git a/tns-core-modules/trace/trace.d.ts b/tns-core-modules/trace/trace.d.ts
index c243dd7d9..c44d4da41 100644
--- a/tns-core-modules/trace/trace.d.ts
+++ b/tns-core-modules/trace/trace.d.ts
@@ -13,11 +13,11 @@ declare module "trace" {
     export function disable(): void;
     
     /**
-     * A field that indicates if the tracer is enabled and there is a point in writing messages.
+     * A function that returns whether the tracer is enabled and there is a point in writing messages.
      * Check this to avoid writing complex string templates.
-     * Send error messages should even if tracing is disabled.
+     * Send error messages even if tracing is disabled.
      */
-    export var enabled: boolean;
+    export function isEnabled(): boolean;
 
     /**
      * Adds a TraceWriter instance to the trace module.
diff --git a/tns-core-modules/trace/trace.ts b/tns-core-modules/trace/trace.ts
index c8dd31f28..0c70b75eb 100644
--- a/tns-core-modules/trace/trace.ts
+++ b/tns-core-modules/trace/trace.ts
@@ -1,7 +1,7 @@
 import * as definition from "trace";
 import * as types from "utils/types";
 
-export var enabled = false;
+var enabled = false;
 var _categories = {};
 var _writers: Array<definition.TraceWriter> = [];
 var _eventListeners: Array<definition.EventListener> = [];
@@ -14,6 +14,10 @@ export function disable() {
     enabled = false;
 }
 
+export function isEnabled() {
+    return enabled;
+}
+
 export function isCategorySet(category: string): boolean {
     return category in _categories;
 }
diff --git a/tns-core-modules/ui/animation/animation-common.ts b/tns-core-modules/ui/animation/animation-common.ts
index 79ddf1407..33d367b88 100644
--- a/tns-core-modules/ui/animation/animation-common.ts
+++ b/tns-core-modules/ui/animation/animation-common.ts
@@ -63,7 +63,7 @@ export abstract class AnimationBase implements AnimationBaseDefinition {
             throw new Error("No animation definitions specified");
         }
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("Analyzing " + animationDefinitions.length + " animation definitions...", traceCategories.Animation);
         }
 
@@ -78,7 +78,7 @@ export abstract class AnimationBase implements AnimationBaseDefinition {
         if (this._propertyAnimations.length === 0) {
             throw new Error("Nothing to animate.");
         }
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("Created " + this._propertyAnimations.length + " individual property animations.", traceCategories.Animation);
         }
 
diff --git a/tns-core-modules/ui/animation/animation.android.ts b/tns-core-modules/ui/animation/animation.android.ts
index fabaf7f4a..f7b59f18f 100644
--- a/tns-core-modules/ui/animation/animation.android.ts
+++ b/tns-core-modules/ui/animation/animation.android.ts
@@ -39,34 +39,34 @@ propertyKeys[Properties.translate] = Symbol(keyPrefix + Properties.translate);
 export function _resolveAnimationCurve(curve: string | CubicBezierAnimationCurve | android.view.animation.Interpolator): android.view.animation.Interpolator {
     switch (curve) {
         case "easeIn":
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Animation curve resolved to android.view.animation.AccelerateInterpolator(1).", traceCategories.Animation);
             }
             return easeIn();
         case "easeOut":
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Animation curve resolved to android.view.animation.DecelerateInterpolator(1).", traceCategories.Animation);
             }
             return easeOut();
         case "easeInOut":
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Animation curve resolved to android.view.animation.AccelerateDecelerateInterpolator().", traceCategories.Animation);
             }
             return easeInOut();
         case "linear":
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Animation curve resolved to android.view.animation.LinearInterpolator().", traceCategories.Animation);
             }
             return linear();
         case "spring":
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Animation curve resolved to android.view.animation.BounceInterpolator().", traceCategories.Animation);
             }
             return bounce();
         case "ease":
             return (<any>android).support.v4.view.animation.PathInterpolatorCompat.create(0.25, 0.1, 0.25, 1.0);
         default:
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Animation curve resolved to original: " + curve, traceCategories.Animation);
             }
             if (curve instanceof CubicBezierAnimationCurve) {
@@ -100,23 +100,23 @@ export class Animation extends AnimationBase {
         let that = new WeakRef(this);
         this._animatorListener = new android.animation.Animator.AnimatorListener({
             onAnimationStart: function (animator: android.animation.Animator): void {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("MainAnimatorListener.onAndroidAnimationStart(" + animator + ")", traceCategories.Animation);
                 }
             },
             onAnimationRepeat: function (animator: android.animation.Animator): void {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("MainAnimatorListener.onAnimationRepeat(" + animator + ")", traceCategories.Animation);
                 }
             },
             onAnimationEnd: function (animator: android.animation.Animator): void {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("MainAnimatorListener.onAnimationEnd(" + animator + ")", traceCategories.Animation);
                 }
                 that.get()._onAndroidAnimationEnd();
             },
             onAnimationCancel: function (animator: android.animation.Animator): void {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("MainAnimatorListener.onAnimationCancel(" + animator + ")", traceCategories.Animation);
                 }
                 that.get()._onAndroidAnimationCancel();
@@ -153,7 +153,7 @@ export class Animation extends AnimationBase {
 
         this._enableHardwareAcceleration();
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("Starting " + this._nativeAnimatorsArray.length + " animations " + (this._playSequentially ? "sequentially." : "together."), traceCategories.Animation);
         }
         this._animatorSet.setupStartValues();
@@ -163,7 +163,7 @@ export class Animation extends AnimationBase {
 
     public cancel(): void {
         super.cancel();
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("Cancelling AnimatorSet.", traceCategories.Animation);
         }
         this._animatorSet.cancel();
@@ -203,7 +203,7 @@ export class Animation extends AnimationBase {
             return;
         }
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("Creating ObjectAnimator(s) for animation: " + Animation._getAnimationInfo(propertyAnimation) + "...", traceCategories.Animation);
         }
 
@@ -385,7 +385,7 @@ export class Animation extends AnimationBase {
                 animators[i].setInterpolator(propertyAnimation.curve);
             }
 
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Animator created: " + animators[i], traceCategories.Animation);
             }
         }
diff --git a/tns-core-modules/ui/animation/animation.ios.ts b/tns-core-modules/ui/animation/animation.ios.ts
index 8f428106e..d34ee4d09 100644
--- a/tns-core-modules/ui/animation/animation.ios.ts
+++ b/tns-core-modules/ui/animation/animation.ios.ts
@@ -157,11 +157,11 @@ export class Animation extends AnimationBase {
         }
 
         if (!playSequentially) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Non-merged Property Animations: " + this._propertyAnimations.length, traceCategories.Animation);
             }
             this._mergedPropertyAnimations = Animation._mergeAffineTransformAnimations(this._propertyAnimations);
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Merged Property Animations: " + this._mergedPropertyAnimations.length, traceCategories.Animation);
             }
         }
@@ -190,13 +190,13 @@ export class Animation extends AnimationBase {
                 }
 
                 if (that._cancelledAnimations > 0 && (that._cancelledAnimations + that._finishedAnimations) === that._mergedPropertyAnimations.length) {
-                    if (traceEnabled) {
+                    if (traceEnabled()) {
                         traceWrite(that._cancelledAnimations + " animations cancelled.", traceCategories.Animation);
                     }
                     that._rejectAnimationFinishedPromise();
                 }
                 else if (that._finishedAnimations === that._mergedPropertyAnimations.length) {
-                    if (traceEnabled) {
+                    if (traceEnabled()) {
                         traceWrite(that._finishedAnimations + " animations finished.", traceCategories.Animation);
                     }
                     that._resolveAnimationFinishedPromise();
@@ -237,7 +237,7 @@ export class Animation extends AnimationBase {
         return (cancelled?: boolean) => {
 
             if (cancelled && finishedCallback) {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("Animation " + (index - 1).toString() + " was cancelled. Will skip the rest of animations and call finishedCallback(true).", traceCategories.Animation);
                 }
                 finishedCallback(cancelled);
@@ -558,11 +558,11 @@ export class Animation extends AnimationBase {
                     iterations: propertyAnimations[i].iterations,
                     curve: propertyAnimations[i].curve
                 };
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("Curve: " + propertyAnimations[i].curve, traceCategories.Animation);
                 }
                 newTransformAnimation.value[propertyAnimations[i].property] = propertyAnimations[i].value;
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("Created new transform animation: " + Animation._getAnimationInfo(newTransformAnimation), traceCategories.Animation);
                 }
 
@@ -571,7 +571,7 @@ export class Animation extends AnimationBase {
                 if (j < length) {
                     for (; j < length; j++) {
                         if (Animation._canBeMerged(propertyAnimations[i], propertyAnimations[j])) {
-                            if (traceEnabled) {
+                            if (traceEnabled()) {
                                 traceWrite("Merging animations: " + Animation._getAnimationInfo(newTransformAnimation) + " + " + Animation._getAnimationInfo(propertyAnimations[j]) + ";", traceCategories.Animation);
                             }
                             newTransformAnimation.value[propertyAnimations[j].property] = propertyAnimations[j].value;
diff --git a/tns-core-modules/ui/core/bindable.ts b/tns-core-modules/ui/core/bindable.ts
index 31abd32d6..75adc1ddd 100644
--- a/tns-core-modules/ui/core/bindable.ts
+++ b/tns-core-modules/ui/core/bindable.ts
@@ -76,7 +76,7 @@ export class Bindable extends DependencyObservable implements definition.Bindabl
     // }
 
     // public _onPropertyChanged(property: Property, oldValue: any, newValue: any) {
-    //     if (traceEnabled) {
+    //     if (traceEnabled()) {
     //         traceWrite(`${this}._onPropertyChanged(${property.name}, ${oldValue}, ${newValue})`, traceCategories.Binding);
     //     }
     //     super._onPropertyChanged(property, oldValue, newValue);
@@ -89,13 +89,13 @@ export class Bindable extends DependencyObservable implements definition.Bindabl
     //     let binding = this.bindings.get(property.name);
     //     if (binding && !binding.updating) {
     //         if (binding.options.twoWay) {
-    //             if (traceEnabled) {
+    //             if (traceEnabled()) {
     //                 traceWrite(`${this}._updateTwoWayBinding(${property.name}, ${newValue});` + property.name, traceCategories.Binding);
     //             }
     //             this._updateTwoWayBinding(property.name, newValue);
     //         }
     //         else {
-    //             if (traceEnabled) {
+    //             if (traceEnabled()) {
     //                 traceWrite(`${this}.unbind(${property.name});`, traceCategories.Binding);
     //             }
     //             this.unbind(property.name);
@@ -115,7 +115,7 @@ export class Bindable extends DependencyObservable implements definition.Bindabl
 
     //     this.bindings.forEach((binding, index, bindings) => {
     //         if (!binding.updating && binding.sourceIsBindingContext && binding.options.targetProperty !== "bindingContext") {
-    //             if (traceEnabled) {
+    //             if (traceEnabled()) {
     //                 traceWrite(`Binding ${binding.target.get()}.${binding.options.targetProperty} to new context ${bindingContextSource}`, traceCategories.Binding);
     //             }
     //             if (!types.isNullOrUndefined(bindingContextSource)) {
diff --git a/tns-core-modules/ui/core/view-base.ts b/tns-core-modules/ui/core/view-base.ts
index 13bde5b0c..107f061e8 100644
--- a/tns-core-modules/ui/core/view-base.ts
+++ b/tns-core-modules/ui/core/view-base.ts
@@ -7,7 +7,7 @@ import { fromString as gestureFromString } from "ui/gestures";
 import { SelectorCore } from "ui/styling/css-selector";
 import { KeyframeAnimation } from "ui/animation/keyframe-animation";
 
-import { enabled as traceEnabled, write as traceWrite, categories as traceCategories, notifyEvent as traceNotifyEvent, isCategorySet } from "trace";
+import { isEnabled as traceEnabled, write as traceWrite, categories as traceCategories, notifyEvent as traceNotifyEvent, isCategorySet } from "trace";
 
 // TODO: Remove this import!
 import * as types from "utils/types";
@@ -426,7 +426,7 @@ export class ViewBase extends Observable implements ViewBaseDefinition {
     }
 
     public _addView(view: ViewBase, atIndex?: number) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${this}._addView(${view}, ${atIndex})`, traceCategories.ViewHierarchy);
         }
 
@@ -463,7 +463,7 @@ export class ViewBase extends Observable implements ViewBaseDefinition {
     * Core logic for removing a child view from this instance. Used by the framework to handle lifecycle events more centralized. Do not outside the UI Stack implementation.
     */
     public _removeView(view: ViewBase) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${this}._removeView(${view})`, traceCategories.ViewHierarchy);
         }
 
@@ -510,7 +510,7 @@ export class ViewBase extends Observable implements ViewBaseDefinition {
 
     public _setupUI(context: android.content.Context, atIndex?: number) {
         traceNotifyEvent(this, "_setupUI");
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${this}._setupUI(${context})`, traceCategories.VisualTreeEvents);
         }
 
@@ -543,7 +543,7 @@ export class ViewBase extends Observable implements ViewBaseDefinition {
     }
 
     public _tearDownUI(force?: boolean) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${this}._tearDownUI(${force})`, traceCategories.VisualTreeEvents);
         }
 
@@ -594,7 +594,7 @@ export class ViewBase extends Observable implements ViewBaseDefinition {
     }
 
     public _goToVisualState(state: string) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(this + " going to state: " + state, traceCategories.Style);
         }
         if (state === this._visualState) {
diff --git a/tns-core-modules/ui/core/view-common.ts b/tns-core-modules/ui/core/view-common.ts
index 0c5c5e2da..e78954241 100644
--- a/tns-core-modules/ui/core/view-common.ts
+++ b/tns-core-modules/ui/core/view-common.ts
@@ -550,7 +550,7 @@ export abstract class ViewCommon extends ViewBase implements ViewDefinition {
     public setMeasuredDimension(measuredWidth: number, measuredHeight: number): void {
         this._measuredWidth = measuredWidth;
         this._measuredHeight = measuredHeight;
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(this + " :setMeasuredDimension: " + measuredWidth + ", " + measuredHeight, traceCategories.Layout);
         }
     }
@@ -668,7 +668,7 @@ export abstract class ViewCommon extends ViewBase implements ViewDefinition {
         childLeft = Math.round(childLeft);
         childTop = Math.round(childTop);
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(child.parent + " :layoutChild: " + child + " " + childLeft + ", " + childTop + ", " + childRight + ", " + childBottom, traceCategories.Layout);
         }
 
@@ -695,7 +695,7 @@ export abstract class ViewCommon extends ViewBase implements ViewDefinition {
             let childWidthMeasureSpec = ViewCommon.getMeasureSpec(width, widthMode, horizontalMargins, child.effectiveWidth, style.horizontalAlignment === HorizontalAlignment.STRETCH);
             let childHeightMeasureSpec = ViewCommon.getMeasureSpec(height, heightMode, verticalMargins, child.effectiveHeight, style.verticalAlignment === VerticalAlignment.STRETCH);
 
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(child.parent + " :measureChild: " + child + " " + layout.measureSpecToString(childWidthMeasureSpec) + ", " + layout.measureSpecToString(childHeightMeasureSpec), traceCategories.Layout);
             }
 
diff --git a/tns-core-modules/ui/core/view.android.ts b/tns-core-modules/ui/core/view.android.ts
index 96270dd4a..0fc2fd27f 100644
--- a/tns-core-modules/ui/core/view.android.ts
+++ b/tns-core-modules/ui/core/view.android.ts
@@ -557,7 +557,7 @@ export class CustomLayoutView extends View implements CustomLayoutViewDefinition
         super._addViewToNativeVisualTree(child);
 
         if (this._nativeView && child.nativeView) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`${this}.nativeView.addView(${child}.nativeView, ${atIndex})`, traceCategories.VisualTreeEvents);
             }
             this._nativeView.addView(child.nativeView, atIndex);
@@ -588,7 +588,7 @@ export class CustomLayoutView extends View implements CustomLayoutViewDefinition
 
         if (this._nativeView && child._nativeView) {
             this._nativeView.removeView(child._nativeView);
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`${this}._nativeView.removeView(${child}._nativeView)`, traceCategories.VisualTreeEvents);
                 traceNotifyEvent(child, "childInLayoutRemovedFromNativeVisualTree");
             }
diff --git a/tns-core-modules/ui/core/view.ios.ts b/tns-core-modules/ui/core/view.ios.ts
index af30b1c05..61d0a9c42 100644
--- a/tns-core-modules/ui/core/view.ios.ts
+++ b/tns-core-modules/ui/core/view.ios.ts
@@ -131,7 +131,7 @@ export class View extends ViewCommon {
 
     public _setNativeViewFrame(nativeView: UIView, frame: CGRect) {
         if (!CGRectEqualToRect(nativeView.frame, frame)) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(this + ", Native setFrame: = " + NSStringFromCGRect(frame), traceCategories.Layout);
             }
             this._cachedFrame = frame;
@@ -161,7 +161,7 @@ export class View extends ViewCommon {
         // // in iOS 8 we set frame to subview again otherwise we get clipped.
         // let nativeView: UIView;
         // if (!this.parent && this.nativeView.subviews.count > 0 && ios.MajorVersion < 8) {
-        //     if (traceEnabled) {
+        //     if (traceEnabled()) {
         //         traceWrite(this + " has no parent. Setting frame to first child instead.", traceCategories.Layout);
         //     }
         //     nativeView = (<UIView>this.nativeView.subviews[0]);
diff --git a/tns-core-modules/ui/definitions.d.ts b/tns-core-modules/ui/definitions.d.ts
index 824fb1cf2..9d416c3a2 100644
--- a/tns-core-modules/ui/definitions.d.ts
+++ b/tns-core-modules/ui/definitions.d.ts
@@ -11,7 +11,7 @@ declare module "ui/core/view-base" {
     import { isIOS, isAndroid } from "platform";
     import { fromString as gestureFromString } from "ui/gestures";
     import { KeyframeAnimation } from "ui/animation/keyframe-animation";
-    import { enabled as traceEnabled, write as traceWrite, categories as traceCategories, notifyEvent as traceNotifyEvent, isCategorySet } from "trace";
+    import { isEnabled as traceEnabled, write as traceWrite, categories as traceCategories, notifyEvent as traceNotifyEvent, isCategorySet } from "trace";
 
     export {
         Observable, EventData, KeyframeAnimation,
diff --git a/tns-core-modules/ui/frame/frame-common.ts b/tns-core-modules/ui/frame/frame-common.ts
index 8f960bc84..22f3c5bd0 100644
--- a/tns-core-modules/ui/frame/frame-common.ts
+++ b/tns-core-modules/ui/frame/frame-common.ts
@@ -67,14 +67,14 @@ export function resolvePageFromEntry(entry: NavigationEntry): Page {
 
         let moduleExports;
         if (global.moduleExists(entry.moduleName)) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Loading pre-registered JS module: " + entry.moduleName, traceCategories.Navigation);
             }
             moduleExports = global.loadModule(entry.moduleName);
         } else {
             let moduleExportsResolvedPath = resolveFileName(moduleNamePath, "js");
             if (moduleExportsResolvedPath) {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("Loading JS file: " + moduleExportsResolvedPath, traceCategories.Navigation);
                 }
 
@@ -85,7 +85,7 @@ export function resolvePageFromEntry(entry: NavigationEntry): Page {
         }
 
         if (moduleExports && moduleExports.createPage) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Calling createPage()", traceCategories.Navigation);
             }
             page = moduleExports.createPage();
@@ -115,7 +115,7 @@ function pageFromBuilder(moduleNamePath: string, moduleExports: any): Page {
     // Possible XML file path.
     let fileName = resolveFileName(moduleNamePath, "xml");
     if (fileName) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("Loading XML file: " + fileName, traceCategories.Navigation);
         }
 
@@ -170,7 +170,7 @@ export class FrameBase extends CustomLayoutView implements FrameDefinition {
      * @param to The backstack entry to navigate back to.
      */
     public goBack(backstackEntry?: BackstackEntry) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`GO BACK`, traceCategories.Navigation);
         }
         if (!this.canGoBack()) {
@@ -199,7 +199,7 @@ export class FrameBase extends CustomLayoutView implements FrameDefinition {
             this._processNavigationContext(navigationContext);
         }
         else {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`Going back scheduled`, traceCategories.Navigation);
             }
         }
@@ -227,7 +227,7 @@ export class FrameBase extends CustomLayoutView implements FrameDefinition {
     // }
 
     public navigate(param: any) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`NAVIGATE`, traceCategories.Navigation);
         }
 
@@ -266,7 +266,7 @@ export class FrameBase extends CustomLayoutView implements FrameDefinition {
             this._processNavigationContext(navigationContext);
         }
         else {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`Navigation scheduled`, traceCategories.Navigation);
             }
         }
@@ -346,13 +346,13 @@ export class FrameBase extends CustomLayoutView implements FrameDefinition {
     }
 
     public _goBackCore(backstackEntry: BackstackEntry) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`GO BACK CORE(${this._backstackEntryTrace(backstackEntry)}); currentPage: ${this.currentPage}`, traceCategories.Navigation);
         }
     }
 
     public _navigateCore(backstackEntry: BackstackEntry) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`NAVIGATE CORE(${this._backstackEntryTrace(backstackEntry)}); currentPage: ${this.currentPage}`, traceCategories.Navigation);
         }
     }
diff --git a/tns-core-modules/ui/frame/frame.android.ts b/tns-core-modules/ui/frame/frame.android.ts
index 70cacf6dd..4edc8842e 100644
--- a/tns-core-modules/ui/frame/frame.android.ts
+++ b/tns-core-modules/ui/frame/frame.android.ts
@@ -19,7 +19,7 @@ let fragmentId = -1;
 let activityInitialized = false;
 
 function onFragmentShown(fragment: android.app.Fragment) {
-    if (traceEnabled) {
+    if (traceEnabled()) {
         traceWrite(`SHOWN ${fragment}`, traceCategories.NativeLifecycle);
     }
 
@@ -27,7 +27,7 @@ function onFragmentShown(fragment: android.app.Fragment) {
     if (callbacks.clearHistory) {
         // This is the fragment which was at the bottom of the stack (fragment0) when we cleared history and called
         // manager.popBackStack(firstEntryName, android.app.FragmentManager.POP_BACK_STACK_INCLUSIVE);
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${fragment} has been shown, but it is being cleared from history. Returning.`, traceCategories.NativeLifecycle);
         }
         return null;
@@ -66,7 +66,7 @@ function onFragmentShown(fragment: android.app.Fragment) {
 }
 
 function onFragmentHidden(fragment: android.app.Fragment, destroyed: boolean) {
-    if (traceEnabled) {
+    if (traceEnabled()) {
         traceWrite(`HIDDEN ${fragment}; destroyed: ${destroyed}`, traceCategories.NativeLifecycle);
     }
     let callbacks: FragmentCallbacksImplementation = fragment[CALLBACKS];
@@ -170,7 +170,7 @@ export class Frame extends FrameBase {
         backstackEntry.navDepth = navDepth;
 
         let fragmentTransaction = manager.beginTransaction();
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`BEGIN TRANSACTION ${fragmentTransaction}`, traceCategories.Navigation);
         }
 
@@ -201,7 +201,7 @@ export class Frame extends FrameBase {
                 transitionModule._prepareCurrentFragmentForClearHistory(currentFragment);
             }
             let firstEntryName = manager.getBackStackEntryAt(0).getName();
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`POP BACK STACK ${firstEntryName}`, traceCategories.Navigation);
             }
             manager.popBackStackImmediate(firstEntryName, android.app.FragmentManager.POP_BACK_STACK_INCLUSIVE);
@@ -210,13 +210,13 @@ export class Frame extends FrameBase {
         // Hide/remove current fragment if it exists and was not popped
         if (currentFragment && !emptyNativeBackStack) {
             if (this.android.cachePagesOnNavigate && !clearHistory) {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite(`\tHIDE ${currentFragment}`, traceCategories.Navigation);
                 }
                 fragmentTransaction.hide(currentFragment);
             }
             else {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite(`\tREMOVE ${currentFragment}`, traceCategories.Navigation);
                 }
                 fragmentTransaction.remove(currentFragment);
@@ -224,7 +224,7 @@ export class Frame extends FrameBase {
         }
 
         // Add newFragment
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`\tADD ${newFragmentTag}<${callbacks.entry.resolvedPage}>`, traceCategories.Navigation);
         }
         fragmentTransaction.add(this.containerViewId, newFragment, newFragmentTag);
@@ -232,7 +232,7 @@ export class Frame extends FrameBase {
         // addToBackStack
         if (this.backStack.length > 0 && currentFragment && !clearHistory) {
             // We add each entry in the backstack to avoid the "Stack corrupted" mismatch
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`\tADD TO BACK STACK ${currentFragment}`, traceCategories.Navigation);
             }
             fragmentTransaction.addToBackStack(this._currentEntry.fragmentTag);
@@ -251,20 +251,20 @@ export class Frame extends FrameBase {
             else {
                 trans = animated ? android.app.FragmentTransaction.TRANSIT_FRAGMENT_OPEN : android.app.FragmentTransaction.TRANSIT_NONE;
             }
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`\tSET TRANSITION ${trans === 0 ? "NONE" : "OPEN"}`, traceCategories.Navigation);
             }
             fragmentTransaction.setTransition(trans);
         }
 
         fragmentTransaction.commit();
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`END TRANSACTION ${fragmentTransaction}`, traceCategories.Navigation);
         }
     }
 
     private static _clearHistory(fragment: android.app.Fragment) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`CLEAR HISTORY FOR ${fragment}`, traceCategories.Navigation);
         }
         let callbacks: FragmentCallbacksImplementation = fragment[CALLBACKS];
@@ -374,14 +374,14 @@ export class Frame extends FrameBase {
                     let weakActivityInstance = weakActivity.get();
                     let isCurrent = args.activity === weakActivityInstance;
                     if (!weakActivityInstance) {
-                        if (traceEnabled) {
+                        if (traceEnabled()) {
                             traceWrite(`Frame _processNavigationContext: Drop For Activity GC-ed`, traceCategories.Navigation);
                         }
                         unsubscribe();
                         return;
                     }
                     if (isCurrent) {
-                        if (traceEnabled) {
+                        if (traceEnabled()) {
                             traceWrite(`Frame _processNavigationContext: Activity.Resumed, Continue`, traceCategories.Navigation);
                         }
                         super._processNavigationContext(navigationContext);
@@ -389,7 +389,7 @@ export class Frame extends FrameBase {
                     }
                 };
                 let unsubscribe = () => {
-                    if (traceEnabled) {
+                    if (traceEnabled()) {
                         traceWrite(`Frame _processNavigationContext: Unsubscribe from Activity.Resumed`, traceCategories.Navigation);
                     }
                     application.android.off(application.AndroidApplication.activityResumedEvent, resume);
@@ -397,7 +397,7 @@ export class Frame extends FrameBase {
                     application.android.off(application.AndroidApplication.activityDestroyedEvent, unsubscribe);
                 };
 
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite(`Frame._processNavigationContext: Subscribe for Activity.Resumed`, traceCategories.Navigation);
                 }
                 application.android.on(application.AndroidApplication.activityResumedEvent, resume);
@@ -542,12 +542,12 @@ function findPageForFragment(fragment: android.app.Fragment, frame: Frame) {
     let page: Page;
     let entry: BackstackEntry;
 
-    if (traceEnabled) {
+    if (traceEnabled()) {
         traceWrite(`Finding page for ${fragmentTag}.`, traceCategories.NativeLifecycle);
     }
 
     if (fragmentTag === DIALOG_FRAGMENT_TAG) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`No need to find page for dialog fragment.`, traceCategories.NativeLifecycle);
         }
         return;
@@ -556,7 +556,7 @@ function findPageForFragment(fragment: android.app.Fragment, frame: Frame) {
     if (frame._currentEntry && frame._currentEntry.fragmentTag === fragmentTag) {
         page = frame.currentPage;
         entry = frame._currentEntry;
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`Current page matches fragment ${fragmentTag}.`, traceCategories.NativeLifecycle);
         }
     }
@@ -570,7 +570,7 @@ function findPageForFragment(fragment: android.app.Fragment, frame: Frame) {
         }
         if (entry) {
             page = entry.resolvedPage;
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`Found ${page} for ${fragmentTag}`, traceCategories.NativeLifecycle);
             }
         }
@@ -644,7 +644,7 @@ class FragmentCallbacksImplementation implements AndroidFragmentCallbacks {
     public clearHistory: boolean;
 
     public onHiddenChanged(fragment: android.app.Fragment, hidden: boolean, superFunc: Function): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${fragment}.onHiddenChanged(${hidden})`, traceCategories.NativeLifecycle);
         }
         superFunc.call(fragment, hidden);
@@ -671,14 +671,14 @@ class FragmentCallbacksImplementation implements AndroidFragmentCallbacks {
             animator = superFunc.call(fragment, transit, enter, nextAnim);
         }
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${fragment}.onCreateAnimator(${transit}, ${enter ? "enter" : "exit"}, ${nextAnimString}): ${animator}`, traceCategories.NativeLifecycle);
         }
         return animator;
     }
 
     public onCreate(fragment: android.app.Fragment, savedInstanceState: android.os.Bundle, superFunc: Function): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${fragment}.onCreate(${savedInstanceState})`, traceCategories.NativeLifecycle);
         }
 
@@ -700,7 +700,7 @@ class FragmentCallbacksImplementation implements AndroidFragmentCallbacks {
     }
 
     public onCreateView(fragment: android.app.Fragment, inflater: android.view.LayoutInflater, container: android.view.ViewGroup, savedInstanceState: android.os.Bundle, superFunc: Function): android.view.View {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${fragment}.onCreateView(inflater, container, ${savedInstanceState})`, traceCategories.NativeLifecycle);
         }
         const entry = this.entry;
@@ -717,7 +717,7 @@ class FragmentCallbacksImplementation implements AndroidFragmentCallbacks {
     }
 
     public onSaveInstanceState(fragment: android.app.Fragment, outState: android.os.Bundle, superFunc: Function): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${fragment}.onSaveInstanceState(${outState})`, traceCategories.NativeLifecycle);
         }
         superFunc.call(fragment, outState);
@@ -727,7 +727,7 @@ class FragmentCallbacksImplementation implements AndroidFragmentCallbacks {
     }
 
     public onDestroyView(fragment: android.app.Fragment, superFunc: Function): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${fragment}.onDestroyView()`, traceCategories.NativeLifecycle);
         }
         superFunc.call(fragment);
@@ -736,7 +736,7 @@ class FragmentCallbacksImplementation implements AndroidFragmentCallbacks {
     }
 
     public onDestroy(fragment: android.app.Fragment, superFunc: Function): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${fragment}.onDestroy()`, traceCategories.NativeLifecycle);
         }
         superFunc.call(fragment);
@@ -751,7 +751,7 @@ class ActivityCallbacksImplementation implements AndroidActivityCallbacks {
     private _rootView: View;
 
     public onCreate(activity: android.app.Activity, savedInstanceState: android.os.Bundle, superFunc: Function): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`Activity.onCreate(${savedInstanceState})`, traceCategories.NativeLifecycle);
         }
 
@@ -837,7 +837,7 @@ class ActivityCallbacksImplementation implements AndroidActivityCallbacks {
     public onStart(activity: any, superFunc: Function): void {
         superFunc.call(activity);
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("NativeScriptActivity.onStart();", traceCategories.NativeLifecycle);
         }
         let rootView = this._rootView;
@@ -849,7 +849,7 @@ class ActivityCallbacksImplementation implements AndroidActivityCallbacks {
     public onStop(activity: any, superFunc: Function): void {
         superFunc.call(activity);
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("NativeScriptActivity.onStop();", traceCategories.NativeLifecycle);
         }
         let rootView = this._rootView;
@@ -866,7 +866,7 @@ class ActivityCallbacksImplementation implements AndroidActivityCallbacks {
 
         superFunc.call(activity);
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("NativeScriptActivity.onDestroy();", traceCategories.NativeLifecycle);
         }
 
@@ -878,7 +878,7 @@ class ActivityCallbacksImplementation implements AndroidActivityCallbacks {
     }
 
     public onBackPressed(activity: any, superFunc: Function): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("NativeScriptActivity.onBackPressed;", traceCategories.NativeLifecycle);
         }
 
@@ -900,7 +900,7 @@ class ActivityCallbacksImplementation implements AndroidActivityCallbacks {
     }
 
     public onRequestPermissionsResult(activity: any, requestCode: number, permissions: Array<String>, grantResults: Array<number>, superFunc: Function): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("NativeScriptActivity.onRequestPermissionsResult;", traceCategories.NativeLifecycle);
         }
 
@@ -916,7 +916,7 @@ class ActivityCallbacksImplementation implements AndroidActivityCallbacks {
 
     public onActivityResult(activity: any, requestCode: number, resultCode: number, data: android.content.Intent, superFunc: Function): void {
         superFunc.call(activity, requestCode, resultCode, data);
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`NativeScriptActivity.onActivityResult(${requestCode}, ${resultCode}, ${data})`, traceCategories.NativeLifecycle);
         }
 
diff --git a/tns-core-modules/ui/frame/frame.ios.ts b/tns-core-modules/ui/frame/frame.ios.ts
index ae7fcad6e..903fb4180 100644
--- a/tns-core-modules/ui/frame/frame.ios.ts
+++ b/tns-core-modules/ui/frame/frame.ios.ts
@@ -119,7 +119,7 @@ export class Frame extends FrameBase {
         // First navigation.
         if (!this._currentEntry) {
             this._ios.controller.pushViewControllerAnimated(viewController, animated);
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`${this}.pushViewControllerAnimated(${viewController}, ${animated}); depth = ${navDepth}`, traceCategories.Navigation);
             }
             return;
@@ -138,7 +138,7 @@ export class Frame extends FrameBase {
             }
 
             this._ios.controller.setViewControllersAnimated(newControllers, animated);
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`${this}.setViewControllersAnimated([${viewController}], ${animated}); depth = ${navDepth}`, traceCategories.Navigation);
             }
             return;
@@ -164,7 +164,7 @@ export class Frame extends FrameBase {
 
             // replace the controllers instead of pushing directly
             this._ios.controller.setViewControllersAnimated(newControllers, animated);
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`${this}.setViewControllersAnimated([originalControllers - lastController + ${viewController}], ${animated}); depth = ${navDepth}`, traceCategories.Navigation);
             }
             return;
@@ -172,7 +172,7 @@ export class Frame extends FrameBase {
 
         // General case.
         this._ios.controller.pushViewControllerAnimated(viewController, animated);
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${this}.pushViewControllerAnimated(${viewController}, ${animated}); depth = ${navDepth}`, traceCategories.Navigation);
         }
     }
@@ -187,7 +187,7 @@ export class Frame extends FrameBase {
             let animated = this._currentEntry ? this._getIsAnimatedNavigation(this._currentEntry.entry) : false;
 
             this._updateActionBar(backstackEntry.resolvedPage);
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`${this}.popToViewControllerAnimated(${controller}, ${animated}); depth = ${navDepth}`, traceCategories.Navigation);
             }
             this._ios.controller.popToViewControllerAnimated(controller, animated);
@@ -366,7 +366,7 @@ export class Frame extends FrameBase {
             return;
         }
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`Forcing navigationBar.frame.origin.y to ${statusBarHeight} due to a higher in-call status-bar`, traceCategories.Layout);
         }
 
@@ -394,19 +394,19 @@ class TransitionDelegate extends NSObject {
     }
 
     public animationWillStart(animationID: string, context: any): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`START ${this._id}`, traceCategories.Transition);
         }
     }
 
     public animationDidStop(animationID: string, finished: boolean, context: any): void {
         if (finished) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`END ${this._id}`, traceCategories.Transition);
             }
         }
         else {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`CANCEL ${this._id}`, traceCategories.Transition);
             }
         }
@@ -453,7 +453,7 @@ class UINavigationControllerAnimatedDelegate extends NSObject implements UINavig
             return null;
         }
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`UINavigationControllerImpl.navigationControllerAnimationControllerForOperationFromViewControllerToViewController(${operation}, ${fromVC}, ${toVC}), transition: ${JSON.stringify(navigationTransition)}`, traceCategories.NativeLifecycle);
         }
 
@@ -487,7 +487,7 @@ class UINavigationControllerImpl extends UINavigationController {
     public viewDidLayoutSubviews(): void {
         let owner = this._owner.get();
         if (owner) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(this._owner + " viewDidLayoutSubviews, isLoaded = " + owner.isLoaded, traceCategories.ViewHierarchy);
             }
 
@@ -525,7 +525,7 @@ class UINavigationControllerImpl extends UINavigationController {
 
     public pushViewControllerAnimated(viewController: UIViewController, animated: boolean): void {
         let navigationTransition = <NavigationTransition>viewController[TRANSITION];
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`UINavigationControllerImpl.pushViewControllerAnimated(${viewController}, ${animated}); transition: ${JSON.stringify(navigationTransition)}`, traceCategories.NativeLifecycle);
         }
 
@@ -544,7 +544,7 @@ class UINavigationControllerImpl extends UINavigationController {
         let viewController = viewControllers.lastObject;
         let navigationTransition = <NavigationTransition>viewController[TRANSITION];
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`UINavigationControllerImpl.setViewControllersAnimated(${viewControllers}, ${animated}); transition: ${JSON.stringify(navigationTransition)}`, traceCategories.NativeLifecycle);
         }
 
@@ -562,7 +562,7 @@ class UINavigationControllerImpl extends UINavigationController {
     public popViewControllerAnimated(animated: boolean): UIViewController {
         let lastViewController = this.viewControllers.lastObject;
         let navigationTransition = <NavigationTransition>lastViewController[TRANSITION];
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`UINavigationControllerImpl.popViewControllerAnimated(${animated}); transition: ${JSON.stringify(navigationTransition)}`, traceCategories.NativeLifecycle);
         }
 
@@ -586,7 +586,7 @@ class UINavigationControllerImpl extends UINavigationController {
     public popToViewControllerAnimated(viewController: UIViewController, animated: boolean): NSArray<UIViewController> {
         let lastViewController = this.viewControllers.lastObject;
         let navigationTransition = <NavigationTransition>lastViewController[TRANSITION];
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`UINavigationControllerImpl.popToViewControllerAnimated(${viewController}, ${animated}); transition: ${JSON.stringify(navigationTransition)}`, traceCategories.NativeLifecycle);
         }
 
@@ -644,31 +644,31 @@ export function _getNativeCurve(transition: NavigationTransition): UIViewAnimati
     if (transition.curve) {
         switch (transition.curve) {
             case "easeIn":
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("Transition curve resolved to UIViewAnimationCurve.EaseIn.", traceCategories.Transition);
                 }
                 return UIViewAnimationCurve.EaseIn;
 
             case "easeOut":
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("Transition curve resolved to UIViewAnimationCurve.EaseOut.", traceCategories.Transition);
                 }
                 return UIViewAnimationCurve.EaseOut;
 
             case "easeInOut":
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("Transition curve resolved to UIViewAnimationCurve.EaseInOut.", traceCategories.Transition);
                 }
                 return UIViewAnimationCurve.EaseInOut;
 
             case "linear":
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("Transition curve resolved to UIViewAnimationCurve.Linear.", traceCategories.Transition);
                 }
                 return UIViewAnimationCurve.Linear;
 
             default:
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("Transition curve resolved to original: " + transition.curve, traceCategories.Transition);
                 }
                 return transition.curve;
diff --git a/tns-core-modules/ui/image-cache/image-cache.ios.ts b/tns-core-modules/ui/image-cache/image-cache.ios.ts
index 95e615d2d..bd10787a6 100644
--- a/tns-core-modules/ui/image-cache/image-cache.ios.ts
+++ b/tns-core-modules/ui/image-cache/image-cache.ios.ts
@@ -35,7 +35,7 @@ class MemmoryWarningHandler extends NSObject {
         this._cache = cache;
 
         getter(NSNotificationCenter, NSNotificationCenter.defaultCenter).addObserverSelectorNameObject(this, "clearCache", "UIApplicationDidReceiveMemoryWarningNotification", null);
-        if (trace.enabled) {
+        if (trace.isEnabled()) {
             trace.write("[MemmoryWarningHandler] Added low memory observer.", trace.categories.Debug);
         }
 
@@ -44,14 +44,14 @@ class MemmoryWarningHandler extends NSObject {
 
     public dealloc(): void {
         getter(NSNotificationCenter, NSNotificationCenter.defaultCenter).removeObserverNameObject(this, "UIApplicationDidReceiveMemoryWarningNotification", null);
-        if (trace.enabled) {
+        if (trace.isEnabled()) {
             trace.write("[MemmoryWarningHandler] Removed low memory observer.", trace.categories.Debug);
         }
         super.dealloc();
     }
 
     public clearCache(): void {
-        if (trace.enabled) {
+        if (trace.isEnabled()) {
             trace.write("[MemmoryWarningHandler] Clearing Image Cache.", trace.categories.Debug);
         }
         this._cache.removeAllObjects();
diff --git a/tns-core-modules/ui/image/image.ios.ts b/tns-core-modules/ui/image/image.ios.ts
index d67361ab4..781fa102b 100644
--- a/tns-core-modules/ui/image/image.ios.ts
+++ b/tns-core-modules/ui/image/image.ios.ts
@@ -69,7 +69,7 @@ export class Image extends ImageBase {
             measureWidth = finiteWidth ? Math.min(resultW, width) : resultW;
             measureHeight = finiteHeight ? Math.min(resultH, height) : resultH;
 
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Image stretch: " + this.stretch +
                     ", nativeWidth: " + nativeWidth +
                     ", nativeHeight: " + nativeHeight, traceCategories.Layout);
diff --git a/tns-core-modules/ui/layouts/layout.android.ts b/tns-core-modules/ui/layouts/layout.android.ts
index 17e50c3a3..f5b41aa55 100644
--- a/tns-core-modules/ui/layouts/layout.android.ts
+++ b/tns-core-modules/ui/layouts/layout.android.ts
@@ -51,7 +51,7 @@ export class Layout extends LayoutBase implements LayoutDefinition {
 
         const view = this._nativeView;
         if (view) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`${this} :measure: ${layout.measureSpecToString(widthMeasureSpec)}, ${layout.measureSpecToString(heightMeasureSpec)}`, traceCategories.Layout);
             }
             view.measure(widthMeasureSpec, heightMeasureSpec);
@@ -64,7 +64,7 @@ export class Layout extends LayoutBase implements LayoutDefinition {
         var view = this._nativeView;
         if (view) {
             this.layoutNativeView(left, top, right, bottom);
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`${this} :layout: ${left}, ${top}, ${right - left}, ${bottom - top}`, traceCategories.Layout);
             }
         }
diff --git a/tns-core-modules/ui/list-view/list-view-common.ts b/tns-core-modules/ui/list-view/list-view-common.ts
index 9a39f5017..e418d89b6 100644
--- a/tns-core-modules/ui/list-view/list-view-common.ts
+++ b/tns-core-modules/ui/list-view/list-view-common.ts
@@ -1,5 +1,5 @@
 import { ListView as ListViewDefinition, ItemsSource } from "ui/list-view";
-import { CoercibleProperty, CssProperty, Style, Bindable, View, Template, KeyedTemplate, Length, Property, Color, lengthComparer } from "ui/core/view";
+import { CoercibleProperty, CssProperty, Style, View, Template, KeyedTemplate, Length, Property, Color, lengthComparer } from "ui/core/view";
 import { parse, parseMultipleTemplates } from "ui/builder";
 import { Label } from "ui/label";
 import { ObservableArray, ChangedData } from "data/observable-array";
diff --git a/tns-core-modules/ui/page/page.ios.ts b/tns-core-modules/ui/page/page.ios.ts
index 5973f5363..7cdfa8848 100644
--- a/tns-core-modules/ui/page/page.ios.ts
+++ b/tns-core-modules/ui/page/page.ios.ts
@@ -75,7 +75,7 @@ class UIViewControllerImpl extends UIViewController {
             return;
         }
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(owner + " viewDidLayoutSubviews, isLoaded = " + owner.isLoaded, traceCategories.ViewHierarchy);
         }
 
@@ -130,7 +130,7 @@ class UIViewControllerImpl extends UIViewController {
                 }
             }
 
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(owner + ", native frame = " + NSStringFromCGRect(this.view.frame), traceCategories.Layout);
             }
         }
@@ -146,8 +146,8 @@ class UIViewControllerImpl extends UIViewController {
         super.viewWillAppear(animated);
         this.shown = false;
         let page = this._owner.get();
-        if (traceEnabled) {
-            if (traceEnabled) {
+        if (traceEnabled()) {
+            if (traceEnabled()) {
                 traceWrite(page + " viewWillAppear", traceCategories.Navigation);
             }
         }
@@ -198,7 +198,7 @@ class UIViewControllerImpl extends UIViewController {
         super.viewDidAppear(animated);
         this.shown = true;
         let page = this._owner.get();
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(page + " viewDidAppear", traceCategories.Navigation);
         }
         if (!page) {
@@ -249,7 +249,7 @@ class UIViewControllerImpl extends UIViewController {
 
     public viewWillDisappear(animated: boolean): void {
         let page = this._owner.get();
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(page + " viewWillDisappear", traceCategories.Navigation);
         }
         if (!page) {
@@ -275,7 +275,7 @@ class UIViewControllerImpl extends UIViewController {
 
     public viewDidDisappear(animated: boolean): void {
         let page = this._owner.get();
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(page + " viewDidDisappear", traceCategories.Navigation);
         }
         // Exit if no page or page is hiding because it shows another page modally.
@@ -374,7 +374,7 @@ export class Page extends PageBase {
 
     private _addNativeView(view: View) {
         if (view) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Native: Adding " + view + " to " + this, traceCategories.ViewHierarchy);
             }
             if (view.ios instanceof UIView) {
@@ -388,7 +388,7 @@ export class Page extends PageBase {
 
     private _removeNativeView(view: View) {
         if (view) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Native: Removing " + view + " from " + this, traceCategories.ViewHierarchy);
             }
             if (view.ios instanceof UIView) {
diff --git a/tns-core-modules/ui/proxy-view-container/proxy-view-container.ts b/tns-core-modules/ui/proxy-view-container/proxy-view-container.ts
index 501bf6239..14a2062aa 100644
--- a/tns-core-modules/ui/proxy-view-container/proxy-view-container.ts
+++ b/tns-core-modules/ui/proxy-view-container/proxy-view-container.ts
@@ -52,7 +52,7 @@ export class ProxyViewContainer extends LayoutBase implements ProxyViewContainer
     }
 
     public _addViewToNativeVisualTree(child: View, atIndex?: number): boolean {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("ViewContainer._addViewToNativeVisualTree for a child " + child + " ViewContainer.parent: " + this.parent, traceCategories.ViewHierarchy);
         }
         super._addViewToNativeVisualTree(child);
@@ -72,7 +72,7 @@ export class ProxyViewContainer extends LayoutBase implements ProxyViewContainer
                 // Add last;
                 insideIndex = this._getNativeViewsCount();
             }
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("ProxyViewContainer._addViewToNativeVisualTree at: " + atIndex + " base: " + baseIndex + " additional: " + insideIndex, traceCategories.ViewHierarchy);
             }
             return parent._addViewToNativeVisualTree(child, baseIndex + insideIndex);
@@ -82,7 +82,7 @@ export class ProxyViewContainer extends LayoutBase implements ProxyViewContainer
     }
 
     public _removeViewFromNativeVisualTree(child: View): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("ProxyViewContainer._removeViewFromNativeVisualTree for a child " + child + " ViewContainer.parent: " + this.parent, traceCategories.ViewHierarchy);
         }
         super._removeViewFromNativeVisualTree(child);
diff --git a/tns-core-modules/ui/styling/font.android.ts b/tns-core-modules/ui/styling/font.android.ts
index 0017fdef8..fdc150b37 100644
--- a/tns-core-modules/ui/styling/font.android.ts
+++ b/tns-core-modules/ui/styling/font.android.ts
@@ -1,5 +1,5 @@
 import { FontBase, parseFontFamily, genericFontFamilies, FontWeight } from "./font-common";
-import { enabled as traceEnabled, write as traceWrite, categories as traceCategories, messageType as traceMessageType } from "trace";
+import { isEnabled as traceEnabled, write as traceWrite, categories as traceCategories, messageType as traceMessageType } from "trace";
 import * as application from "application";
 import * as fs from "file-system";
 
@@ -75,7 +75,7 @@ function loadFontFromFile(fontFamily: string): android.graphics.Typeface {
             fontAssetPath = FONTS_BASE_PATH + fontFamily + ".otf";
         }
         else {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Could not find font file for " + fontFamily, traceCategories.Error, traceMessageType.error);
             }
         }
@@ -85,7 +85,7 @@ function loadFontFromFile(fontFamily: string): android.graphics.Typeface {
                 fontAssetPath = fs.path.join(fs.knownFolders.currentApp().path, fontAssetPath);
                 result = android.graphics.Typeface.createFromFile(fontAssetPath);
             } catch (e) {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("Error loading font asset: " + fontAssetPath, traceCategories.Error, traceMessageType.error);
                 }
             }
diff --git a/tns-core-modules/ui/styling/font.ios.ts b/tns-core-modules/ui/styling/font.ios.ts
index feb02bbac..be88b1eaa 100644
--- a/tns-core-modules/ui/styling/font.ios.ts
+++ b/tns-core-modules/ui/styling/font.ios.ts
@@ -1,5 +1,5 @@
 import { FontBase, parseFontFamily, genericFontFamilies, FontStyle, FontWeight } from "./font-common";
-import { enabled as traceEnabled, write as traceWrite, categories as traceCategories, messageType as traceMessageType } from "trace";
+import { isEnabled as traceEnabled, write as traceWrite, categories as traceCategories, messageType as traceMessageType } from "trace";
 import * as fs from "file-system";
 import * as utils from "utils/utils";
 
@@ -310,7 +310,7 @@ export module ios {
 
         const error = new interop.Reference<NSError>();
         if (!CTFontManagerRegisterGraphicsFont(font, error)) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("Error occur while registering font: " + CFErrorCopyDescription(<NSError>error.value), traceCategories.Error, traceMessageType.error);
             }
         }
diff --git a/tns-core-modules/ui/styling/style.ts b/tns-core-modules/ui/styling/style.ts
index 225917dde..8db940daf 100644
--- a/tns-core-modules/ui/styling/style.ts
+++ b/tns-core-modules/ui/styling/style.ts
@@ -180,7 +180,7 @@ export class Style extends Observable implements StyleDefinition {
     // }
 
     // public _onPropertyChanged(property: Property, oldValue: any, newValue: any) {
-    //     if (traceEnabled) {
+    //     if (traceEnabled()) {
     //         traceWrite(
     //             "Style._onPropertyChanged view:" + this._view +
     //             ", property: " + property.name +
@@ -239,12 +239,12 @@ export class Style extends Observable implements StyleDefinition {
 
     //     let handler: definition.StylePropertyChangedHandler = getHandler(property, this._view);
     //     if (!handler) {
-    //         if (traceEnabled) {
+    //         if (traceEnabled()) {
     //             traceWrite("No handler for property: " + property.name + " with id: " + property.id + ", view:" + this._view, traceCategories.Style);
     //         }
     //     }
     //     else {
-    //         if (traceEnabled) {
+    //         if (traceEnabled()) {
     //             traceWrite("Found handler for property: " + property.name + ", view:" + this._view, traceCategories.Style);
     //         }
 
diff --git a/tns-core-modules/ui/tab-view/tab-view.android.ts b/tns-core-modules/ui/tab-view/tab-view.android.ts
index 533e30698..dfe69808b 100644
--- a/tns-core-modules/ui/tab-view/tab-view.android.ts
+++ b/tns-core-modules/ui/tab-view/tab-view.android.ts
@@ -121,7 +121,7 @@ function ensurePagerAdapterClass() {
         }
 
         instantiateItem(container: android.view.ViewGroup, index: number) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("TabView.PagerAdapter.instantiateItem; container: " + container + "; index: " + index, traceCategory);
             }
 
@@ -131,7 +131,7 @@ function ensurePagerAdapterClass() {
             // }
 
             if (this[VIEWS_STATES]) {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("TabView.PagerAdapter.instantiateItem; restoreHierarchyState: " + item.view, traceCategory);
                 }
                 item.view._nativeView.restoreHierarchyState(this[VIEWS_STATES]);
@@ -144,7 +144,7 @@ function ensurePagerAdapterClass() {
         }
 
         destroyItem(container: android.view.ViewGroup, index: number, _object: any) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("TabView.PagerAdapter.destroyItem; container: " + container + "; index: " + index + "; _object: " + _object, traceCategory);
             }
             let item = this.items[index];
@@ -172,7 +172,7 @@ function ensurePagerAdapterClass() {
         }
 
         saveState(): android.os.Parcelable {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("TabView.PagerAdapter.saveState", traceCategory);
             }
 
@@ -201,7 +201,7 @@ function ensurePagerAdapterClass() {
         }
 
         restoreState(state: android.os.Parcelable, loader: java.lang.ClassLoader) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("TabView.PagerAdapter.restoreState", traceCategory);
             }
             let bundle: android.os.Bundle = <android.os.Bundle>state;
@@ -280,7 +280,7 @@ export class TabView extends TabViewBase {
     }
 
     public _createNativeView() {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("TabView._createUI(" + this + ");", traceCategory);
         }
 
@@ -371,7 +371,7 @@ export class TabView extends TabViewBase {
         return -1;
     }
     set [selectedIndexProperty.native](value: number) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("TabView this._viewPager.setCurrentItem(" + value + ", true);", traceCategory);
         }
         this._viewPager.setCurrentItem(value, true);
diff --git a/tns-core-modules/ui/tab-view/tab-view.ios.ts b/tns-core-modules/ui/tab-view/tab-view.ios.ts
index f1de61226..385186122 100644
--- a/tns-core-modules/ui/tab-view/tab-view.ios.ts
+++ b/tns-core-modules/ui/tab-view/tab-view.ios.ts
@@ -21,7 +21,7 @@ class UITabBarControllerImpl extends UITabBarController {
     }
 
     public viewDidLayoutSubviews(): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("TabView.UITabBarControllerClass.viewDidLayoutSubviews();", traceCategories.Debug);
         }
         super.viewDidLayoutSubviews();
@@ -44,7 +44,7 @@ class UITabBarControllerDelegateImpl extends NSObject implements UITabBarControl
     }
 
     public tabBarControllerShouldSelectViewController(tabBarController: UITabBarController, viewController: UIViewController): boolean {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("TabView.delegate.SHOULD_select(" + tabBarController + ", " + viewController + ");", traceCategories.Debug);
         }
 
@@ -59,7 +59,7 @@ class UITabBarControllerDelegateImpl extends NSObject implements UITabBarControl
     }
 
     public tabBarControllerDidSelectViewController(tabBarController: UITabBarController, viewController: UIViewController): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("TabView.delegate.DID_select(" + tabBarController + ", " + viewController + ");", traceCategories.Debug);
         }
 
@@ -82,7 +82,7 @@ class UINavigationControllerDelegateImpl extends NSObject implements UINavigatio
     }
 
     navigationControllerWillShowViewControllerAnimated(navigationController: UINavigationController, viewController: UIViewController, animated: boolean): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("TabView.moreNavigationController.WILL_show(" + navigationController + ", " + viewController + ", " + animated + ");", traceCategories.Debug);
         }
 
@@ -96,7 +96,7 @@ class UINavigationControllerDelegateImpl extends NSObject implements UINavigatio
     }
 
     navigationControllerDidShowViewControllerAnimated(navigationController: UINavigationController, viewController: UIViewController, animated: boolean): void {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("TabView.moreNavigationController.DID_show(" + navigationController + ", " + viewController + ", " + animated + ");", traceCategories.Debug);
         }
         // We don't need Edit button in More screen.
@@ -182,14 +182,14 @@ export class TabView extends TabViewBase {
 
     public _onViewControllerShown(viewController: UIViewController) {
         // This method could be called with the moreNavigationController or its list controller, so we have to check.
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("TabView._onViewControllerShown(" + viewController + ");", traceCategories.Debug);
         }
         if (this._ios.viewControllers && this._ios.viewControllers.containsObject(viewController)) {
             this.selectedIndex = this._ios.viewControllers.indexOfObject(viewController);
         }
         else {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("TabView._onViewControllerShown: viewController is not one of our viewControllers", traceCategories.Debug);
             }
         }
@@ -197,7 +197,7 @@ export class TabView extends TabViewBase {
 
     private _actionBarHiddenByTabView: boolean;
     public _handleTwoNavigationBars(backToMoreWillBeVisible: boolean) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`TabView._handleTwoNavigationBars(backToMoreWillBeVisible: ${backToMoreWillBeVisible})`, traceCategories.Debug);
         }
 
@@ -210,7 +210,7 @@ export class TabView extends TabViewBase {
             page.actionBarHidden = true;
             page.frame.ios._disableNavBarAnimation = false;
             this._actionBarHiddenByTabView = true;
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`TabView hid action bar`, traceCategories.Debug);
             }
             return;
@@ -221,7 +221,7 @@ export class TabView extends TabViewBase {
             page.actionBarHidden = false;
             page.frame.ios._disableNavBarAnimation = false;
             this._actionBarHiddenByTabView = undefined;
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`TabView restored action bar`, traceCategories.Debug);
             }
             return;
@@ -382,7 +382,7 @@ export class TabView extends TabViewBase {
         return -1;
     }
     set [selectedIndexProperty.native](value: number) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("TabView._onSelectedIndexPropertyChangedSetNativeValue(" + value + ")", traceCategories.Debug);
         }
 
diff --git a/tns-core-modules/ui/transition/transition.android.ts b/tns-core-modules/ui/transition/transition.android.ts
index ae3b5a363..3a39cfd08 100644
--- a/tns-core-modules/ui/transition/transition.android.ts
+++ b/tns-core-modules/ui/transition/transition.android.ts
@@ -6,7 +6,7 @@ import { device } from "platform";
 import { _resolveAnimationCurve } from "ui/animation";
 import lazy from "utils/lazy";
 
-import { enabled as traceEnabled, write as traceWrite, categories as traceCategories } from "trace";
+import { isEnabled as traceEnabled, write as traceWrite, categories as traceCategories } from "trace";
 
 let slideTransition: any;
 function ensureSlideTransition() {
@@ -60,7 +60,7 @@ export module AndroidTransitionType {
 export function _clearBackwardTransitions(fragment: any): void {
     let expandedFragment = <ExpandedFragment>fragment;
     if (expandedFragment.enterPopExitTransition) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`Cleared enterPopExitTransition ${expandedFragment.enterPopExitTransition} for ${fragment}`, traceCategories.Transition);
         }
         if (expandedFragment.enterPopExitTransitionListener) {
@@ -72,7 +72,7 @@ export function _clearBackwardTransitions(fragment: any): void {
     if (_sdkVersion() >= 21) {
         let enterTransition = (<any>fragment).getEnterTransition();
         if (enterTransition) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`Cleared Enter ${enterTransition.getClass().getSimpleName()} transition for ${fragment}`, traceCategories.Transition);
             }
             if (enterTransition.transitionListener) {
@@ -82,7 +82,7 @@ export function _clearBackwardTransitions(fragment: any): void {
         }
         let returnTransition = (<any>fragment).getReturnTransition();
         if (returnTransition) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`Cleared Pop Exit ${returnTransition.getClass().getSimpleName()} transition for ${fragment}`, traceCategories.Transition);
             }
             if (returnTransition.transitionListener) {
@@ -96,7 +96,7 @@ export function _clearBackwardTransitions(fragment: any): void {
 export function _clearForwardTransitions(fragment: any): void {
     let expandedFragment = <ExpandedFragment>fragment;
     if (expandedFragment.exitPopEnterTransition) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`Cleared exitPopEnterTransition ${expandedFragment.exitPopEnterTransition} for ${fragment}`, traceCategories.Transition);
         }
         if (expandedFragment.exitPopEnterTransitionListener) {
@@ -108,7 +108,7 @@ export function _clearForwardTransitions(fragment: any): void {
     if (_sdkVersion() >= 21) {
         let exitTransition = (<any>fragment).getExitTransition();
         if (exitTransition) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`Cleared Exit ${exitTransition.getClass().getSimpleName()} transition for ${fragment}`, traceCategories.Transition);
             }
             if (exitTransition.transitionListener) {
@@ -118,7 +118,7 @@ export function _clearForwardTransitions(fragment: any): void {
         }
         let reenterTransition = (<any>fragment).getReenterTransition();
         if (reenterTransition) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`Cleared Pop Enter ${reenterTransition.getClass().getSimpleName()} transition for ${fragment}`, traceCategories.Transition);
             }
             if (reenterTransition.transitionListener) {
@@ -297,14 +297,14 @@ function _setUpNativeTransition(navigationTransition: NavigationTransition, nati
 }
 
 export function _onFragmentShown(fragment: any, isBack: boolean): void {
-    if (traceEnabled) {
+    if (traceEnabled()) {
         traceWrite(`_onFragmentShown(${fragment}, isBack: ${isBack})`, traceCategories.Transition);
     }
     let expandedFragment = <ExpandedFragment>fragment;
     let transitionType = isBack ? "Pop Enter" : "Enter";
     let relevantTransition = isBack ? expandedFragment.exitPopEnterTransition : expandedFragment.enterPopExitTransition;
     if (relevantTransition) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${fragment} has been shown when going ${isBack ? "back" : "forward"}, but there is ${transitionType} ${relevantTransition}. Will complete page addition when transition ends.`, traceCategories.Transition);
         }
         expandedFragment.completePageAdditionWhenTransitionEnds = { isBack: isBack };
@@ -312,7 +312,7 @@ export function _onFragmentShown(fragment: any, isBack: boolean): void {
     else if (_sdkVersion() >= 21) {
         let nativeTransition = isBack ? (<any>fragment).getReenterTransition() : (<any>fragment).getEnterTransition();
         if (nativeTransition) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`${fragment} has been shown when going ${isBack ? "back" : "forward"}, but there is ${transitionType} ${nativeTransition.getClass().getSimpleName()} transition. Will complete page addition when transition ends.`, traceCategories.Transition);
             }
             expandedFragment.completePageAdditionWhenTransitionEnds = { isBack: isBack };
@@ -325,14 +325,14 @@ export function _onFragmentShown(fragment: any, isBack: boolean): void {
 }
 
 export function _onFragmentHidden(fragment: any, isBack: boolean, destroyed: boolean) {
-    if (traceEnabled) {
+    if (traceEnabled()) {
         traceWrite(`_onFragmentHidden(${fragment}, isBack: ${isBack}, destroyed: ${destroyed})`, traceCategories.Transition);
     }
     let expandedFragment = <ExpandedFragment>fragment;
     let transitionType = isBack ? "Pop Exit" : "Exit";
     let relevantTransition = isBack ? expandedFragment.enterPopExitTransition : expandedFragment.exitPopEnterTransition;
     if (relevantTransition) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`${fragment} has been hidden when going ${isBack ? "back" : "forward"}, but there is ${transitionType} ${relevantTransition}. Will complete page removal when transition ends.`, traceCategories.Transition);
         }
         expandedFragment.completePageRemovalWhenTransitionEnds = { isBack: isBack };
@@ -340,7 +340,7 @@ export function _onFragmentHidden(fragment: any, isBack: boolean, destroyed: boo
     else if (_sdkVersion() >= 21) {
         let nativeTransition = isBack ? (<any>fragment).getReturnTransition() : (<any>fragment).getExitTransition();
         if (nativeTransition) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`${fragment} has been hidden when going ${isBack ? "back" : "forward"}, but there is ${transitionType} ${nativeTransition.getClass().getSimpleName()} transition. Will complete page removal when transition ends.`, traceCategories.Transition);
             }
             expandedFragment.completePageRemovalWhenTransitionEnds = { isBack: isBack };
@@ -361,7 +361,7 @@ function _completePageAddition(fragment: any, isBack: boolean) {
     let frame = fragment._callbacks.frame;
     let entry: BackstackEntry = fragment._callbacks.entry;
     let page: Page = entry.resolvedPage;
-    if (traceEnabled) {
+    if (traceEnabled()) {
         traceWrite(`STARTING ADDITION of ${page}...`, traceCategories.Transition);
     }
     // The original code that was once in Frame onFragmentShown
@@ -369,7 +369,7 @@ function _completePageAddition(fragment: any, isBack: boolean) {
     page.onNavigatedTo(isBack);
     frame._processNavigationQueue(page);
     entry.isNavigation = undefined;
-    if (traceEnabled) {
+    if (traceEnabled()) {
         traceWrite(`ADDITION of ${page} completed`, traceCategories.Transition);
     }
 }
@@ -380,7 +380,7 @@ function _completePageRemoval(fragment: any, isBack: boolean) {
     let frame = fragment._callbacks.frame;
     let entry: BackstackEntry = fragment._callbacks.entry;
     let page: Page = entry.resolvedPage;
-    if (traceEnabled) {
+    if (traceEnabled()) {
         traceWrite(`STARTING REMOVAL of ${page}...`, traceCategories.Transition);
     }
     if (page.frame) {
@@ -389,12 +389,12 @@ function _completePageRemoval(fragment: any, isBack: boolean) {
         if (entry.isNavigation) {
             page.onNavigatedFrom(isBack);
         }
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`REMOVAL of ${page} completed`, traceCategories.Transition);
         }
     }
     else {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`REMOVAL of ${page} has already been done`, traceCategories.Transition);
         }
     }
@@ -403,12 +403,12 @@ function _completePageRemoval(fragment: any, isBack: boolean) {
         expandedFragment.isDestroyed = undefined;
         if (page._context) {
             page._tearDownUI(true);
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`DETACHMENT of ${page} completed`, traceCategories.Transition);
             }
         }
         else {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`DETACHMENT of ${page} has already been done`, traceCategories.Transition);
             }
             _removePageNativeViewFromAndroidParent(page);
@@ -422,7 +422,7 @@ export function _removePageNativeViewFromAndroidParent(page: Page): void {
     if (page._nativeView && page._nativeView.getParent) {
         let androidParent = page._nativeView.getParent();
         if (androidParent && androidParent.removeView) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`REMOVED ${page}._nativeView from its Android parent`, traceCategories.Transition);
             }
             page._tearDownUI(true);
@@ -442,7 +442,7 @@ function _addNativeTransitionListener(fragment: any, nativeTransition: any/*andr
             if (!expandedFragment) {
                 return;
             }
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`CANCEL ${_toShortString(transition)} transition for ${expandedFragment}`, traceCategories.Transition);
             }
             if (expandedFragment.completePageRemovalWhenTransitionEnds) {
@@ -458,7 +458,7 @@ function _addNativeTransitionListener(fragment: any, nativeTransition: any/*andr
             if (!expandedFragment) {
                 return;
             }
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`END ${_toShortString(transition)} transition for ${expandedFragment}`, traceCategories.Transition);
             }
             if (expandedFragment.completePageRemovalWhenTransitionEnds) {
@@ -471,19 +471,19 @@ function _addNativeTransitionListener(fragment: any, nativeTransition: any/*andr
         },
         onTransitionPause: function (transition: any): void {
             let expandedFragment = this.fragment;
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`PAUSE ${_toShortString(transition)} transition for ${expandedFragment}`, traceCategories.Transition);
             }
         },
         onTransitionResume: function (transition: any): void {
             let expandedFragment = this.fragment;
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`RESUME ${_toShortString(transition)} transition for ${expandedFragment}`, traceCategories.Transition);
             }
         },
         onTransitionStart: function (transition: any): void {
             let expandedFragment = this.fragment;
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`START ${_toShortString(transition)} transition for ${expandedFragment}`, traceCategories.Transition);
             }
         }
@@ -551,17 +551,17 @@ export function _onFragmentCreateAnimator(fragment: ExpandedFragment, nextAnim:
 
         let transitionListener: any = new android.animation.Animator.AnimatorListener({
             onAnimationStart: function (animator: android.animation.Animator): void {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite(`START ${transitionType} ${this.transition} for ${this.fragment}`, traceCategories.Transition);
                 }
             },
             onAnimationRepeat: function (animator: android.animation.Animator): void {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite(`REPEAT ${transitionType} ${this.transition} for ${this.fragment}`, traceCategories.Transition);
                 }
             },
             onAnimationEnd: function (animator: android.animation.Animator): void {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite(`END ${transitionType} ${this.transition} for ${this.fragment}`, traceCategories.Transition);
                 }
 
@@ -576,7 +576,7 @@ export function _onFragmentCreateAnimator(fragment: ExpandedFragment, nextAnim:
                 this.checkedRemove();
             },
             onAnimationCancel: function (animator: android.animation.Animator): void {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite(`CANCEL ${transitionType} ${this.transition} for ${this.fragment}`, traceCategories.Transition);
                 }
 
@@ -668,7 +668,7 @@ function ensureIntEvaluator() {
 }
 
 function _createDummyZeroDurationAnimator(): android.animation.Animator {
-    if (traceEnabled) {
+    if (traceEnabled()) {
         traceWrite(`_createDummyZeroDurationAnimator()`, traceCategories.Transition);
     }
     ensureIntEvaluator();
diff --git a/tns-core-modules/ui/transition/transition.ios.ts b/tns-core-modules/ui/transition/transition.ios.ts
index 017cb1894..404d7bd9d 100644
--- a/tns-core-modules/ui/transition/transition.ios.ts
+++ b/tns-core-modules/ui/transition/transition.ios.ts
@@ -1,7 +1,7 @@
 import { Transition as TransitionDefinition } from "ui/transition";
 import { NavigationTransition } from "ui/frame";
 import { 
-    enabled as traceEnabled,
+    isEnabled as traceEnabled,
     write as traceWrite,
     categories as traceCategories
 } from "trace";
@@ -50,7 +50,7 @@ class AnimatedTransitioning extends NSObject implements UIViewControllerAnimated
             case UINavigationControllerOperation.None: this._transitionType = "none"; break;
         }
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite(`START ${this._transition} ${this._transitionType}`, traceCategories.Transition);
         }
         this._transition.animateIOSTransition(containerView, this._fromVC.view, this._toVC.view, this._operation, completion);
@@ -62,12 +62,12 @@ class AnimatedTransitioning extends NSObject implements UIViewControllerAnimated
 
     public animationEnded(transitionCompleted: boolean): void {
         if (transitionCompleted) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`END ${this._transition} ${this._transitionType}`, traceCategories.Transition);
             }
         }
         else {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite(`CANCEL ${this._transition} ${this._transitionType}`, traceCategories.Transition);
             }
         }
diff --git a/tns-core-modules/ui/web-view/web-view.android.ts b/tns-core-modules/ui/web-view/web-view.android.ts
index d3be67213..1e910b176 100644
--- a/tns-core-modules/ui/web-view/web-view.android.ts
+++ b/tns-core-modules/ui/web-view/web-view.android.ts
@@ -19,7 +19,7 @@ function ensureWebViewClientClass() {
         }
 
         public shouldOverrideUrlLoading(view: android.webkit.WebView, url: string) {
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("WebViewClientClass.shouldOverrideUrlLoading(" + url + ")", traceCategories.Debug);
             }
             return false;
@@ -29,7 +29,7 @@ function ensureWebViewClientClass() {
             super.onPageStarted(view, url, favicon);
 
             if (this._view) {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("WebViewClientClass.onPageStarted(" + url + ", " + favicon + ")", traceCategories.Debug);
                 }
                 this._view._onLoadStarted(url, WebViewBase.navigationTypes[WebViewBase.navigationTypes.indexOf("linkClicked")]);
@@ -40,7 +40,7 @@ function ensureWebViewClientClass() {
             super.onPageFinished(view, url);
 
             if (this._view) {
-                if (traceEnabled) {
+                if (traceEnabled()) {
                     traceWrite("WebViewClientClass.onPageFinished(" + url + ")", traceCategories.Debug);
                 }
                 this._view._onLoadFinished(url, undefined);
@@ -58,7 +58,7 @@ function ensureWebViewClientClass() {
                 super.onReceivedError(view, errorCode, description, failingUrl);
 
                 if (this._view) {
-                    if (traceEnabled) {
+                    if (traceEnabled()) {
                         traceWrite("WebViewClientClass.onReceivedError(" + errorCode + ", " + description + ", " + failingUrl + ")", traceCategories.Debug);
                     }
                     this._view._onLoadFinished(failingUrl, description + "(" + errorCode + ")");
@@ -70,7 +70,7 @@ function ensureWebViewClientClass() {
                 super.onReceivedError(view, request, error);
 
                 if (this._view) {
-                    if (traceEnabled) {
+                    if (traceEnabled()) {
                         traceWrite("WebViewClientClass.onReceivedError(" + error.getErrorCode() + ", " + error.getDescription() + ", " + (error.getUrl && error.getUrl()) + ")", traceCategories.Debug);
                     }
                     this._view._onLoadFinished(error.getUrl && error.getUrl(), error.getDescription() + "(" + error.getErrorCode() + ")");
@@ -116,7 +116,7 @@ export class WebView extends WebViewBase {
             return;
         }
 
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("WebView._loadUrl(" + url + ")", traceCategories.Debug);
         }
         this._android.stopLoading();
diff --git a/tns-core-modules/ui/web-view/web-view.ios.ts b/tns-core-modules/ui/web-view/web-view.ios.ts
index 6b1ef6bce..e7a2ed4d8 100644
--- a/tns-core-modules/ui/web-view/web-view.ios.ts
+++ b/tns-core-modules/ui/web-view/web-view.ios.ts
@@ -37,7 +37,7 @@ class UIWebViewDelegateImpl extends NSObject implements UIWebViewDelegate {
                     break;
             }
 
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("UIWebViewDelegateClass.webViewShouldStartLoadWithRequestNavigationType(" + request.URL.absoluteString + ", " + navigationType + ")", traceCategories.Debug);
             }
             owner._onLoadStarted(request.URL.absoluteString, WebViewBase.navigationTypes[navTypeIndex]);
@@ -47,13 +47,13 @@ class UIWebViewDelegateImpl extends NSObject implements UIWebViewDelegate {
     }
 
     public webViewDidStartLoad(webView: UIWebView) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("UIWebViewDelegateClass.webViewDidStartLoad(" + webView.request.URL + ")", traceCategories.Debug);
         }
     }
 
     public webViewDidFinishLoad(webView: UIWebView) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("UIWebViewDelegateClass.webViewDidFinishLoad(" + webView.request.URL + ")", traceCategories.Debug);
         }
         let owner = this._owner.get();
@@ -70,7 +70,7 @@ class UIWebViewDelegateImpl extends NSObject implements UIWebViewDelegate {
                 src = webView.request.URL.absoluteString;
             }
 
-            if (traceEnabled) {
+            if (traceEnabled()) {
                 traceWrite("UIWebViewDelegateClass.webViewDidFailLoadWithError(" + error.localizedDescription + ")", traceCategories.Debug);
             }
             if (owner) {
@@ -110,7 +110,7 @@ export class WebView extends WebViewBase {
     }
 
     public _loadUrl(url: string) {
-        if (traceEnabled) {
+        if (traceEnabled()) {
             traceWrite("WebView._loadUrl(" + url + ")", traceCategories.Debug);
         }