Starling keyboard events can be cancelled, which then cancels native keyboard events

Native KeyboardEvents are cancellable with preventDefault(). This is essential for certain keyCodes like Keyboard.BACK where you need to call preventDefault() to keep Android from handling the back button and leaving your app.

Starling should expose this ability to cancel keyboard events. If, after broadcastEvent() returns, the new function isDefaultPrevented() returns true, preventDefault() can be called on the native event.