docs: function createViewModel(initialData, hasDataBinding, bindingState) {
  
  			if(bindingState && bindingState.isSettingOnViewModel === true) {
  				// If we are setting a value like `x:from="y"`,
  				// we need to make a variable scope.
  				newScope = tagData.scope.addLetContext(initialData);
  				return newScope._context;
  
  			} else {
  				// If we are setting the ViewModel itself, we
  				// stick the value in an observable: `this:from="value"`.
  				return vm = new SimpleObservable(initialData);
  			}
  		}