how-tos made with markdown snippet injector

apps/tests/image-source.md

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+---
+nav-title: "image-source How-To"
+title: "How-To"
+description: "Examples for using image-source"
+---
+# Image source
+Using the image source requires the image-source module.
+<snippet id='imagesource-require'/>
+The pre-required `imageSource` module is used throughout the following code snippets.
+We also use fs module defined as follows:
+<snippet id='imagesource-require-alt'/>
+
+## Loading and saving images
+### Load image using resource name
+This is similar to loading Bitmap from `R.drawable.logo` on Android or calling `[UIImage imageNamed@"logo"]` on iOS
+<snippet id='imagesource-resname'/>
+
+### Load image from URL
+<snippet id='imagesource-load-url'/>
+
+### Save image source to PNG or JPG file
+<snippet id='imagesource-save-to'/>
+
+### Load image from a local file
+<snippet id='imagesource-load-local'/>