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The descriptions for both AppComponent and AppUiComponent remain the same as in the Custom View tutorial.
AppComponent
This is the base Application class and may be used for non-UI related functionality (not addressed in this tutorial).
AppUiComponent
This is the base class for UI functionality. See the Custom View tutorial for a description.
AppUiMessageHandler
This class extends UiMessageHandler to implement code that handles events from the (client-side) sample application view. Salient features of note:
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