NativeScript/nativescript-core/globals/decorators.ts

export function Deprecated(target: Object, key?: string | symbol, descriptor?: any) {
  if (descriptor) {
    const originalMethod = descriptor.value;

    descriptor.value = function (...args: any[]) {
      console.log(`${key.toString()} is deprecated`);

      return originalMethod.apply(this, args);
    };

    return descriptor;
  } else {
    console.log(`${(target && (<any>target).name) || target} is deprecated`);

    return target;
  }
}

global.Deprecated = Deprecated;

export function Experimental(target: Object, key?: string | symbol, descriptor?: any) {
  if (descriptor) {
    const originalMethod = descriptor.value;

    descriptor.value = function (...args: any[]) {
      console.log(`${key.toString()} is experimental`);

      return originalMethod.apply(this, args);
    };

    return descriptor;
  } else {
    console.log(`${(target && (<any>target).name) || target} is experimental`);

    return target;
  }
}

global.Experimental = Experimental;