CloseRequestedEvent
The event passed to a {@link Window.onCloseRequested} handler.
Call {@link CloseRequestedEvent.preventDefault} to keep the window open, for example to ask the user to save their work first.
The event passed to a {@link Window.onCloseRequested} handler.
Call {@link CloseRequestedEvent.preventDefault} to keep the window open, for example to ask the user to save their work first.