*<Null safety>*
Future<void> requestFocus ()
Future<void> requestFocus() async { assert(viewRef != null); final args = <String, dynamic>{ 'viewRef': viewRef!.reference.handle!.handle }; final result = await _platformViewChannel.invokeMethod('View.requestFocus', args); // Throw OSError if result is non-zero. if (result != 0) { final koid = viewRef!.reference.handle!.koid; final error = Error(result); throw OSError( 'Failed to request focus for view: $koid with $error', result, ); } }