set
ScrollAway: This enables a natively-controlled navbar that optionally obscures the top content of the ScrollView. Whether or not the navbar is obscuring the React Native surface is determined outside of React Native.
Note: all ScrollViews and HorizontalScrollViews in React have exactly one child: the "content" View (see ScrollView.js). That View is non-collapsable so it will never be View-flattened away. However, it is possible to pass custom styles into that View.
If you are using this feature it is assumed that you have full control over this ScrollView and that you are **not** overriding the ScrollView content view to pass in a `translateY` style. `translateY` must never be set from ReactJS while using this feature!