showPicker method
Shows device picker
Implementation
Future<void> showPicker() async {
_throwIfDisposed();
_startShowPickerOperation();
final completer = Completer<void>();
_showPickerCompleter = completer;
try {
_sessionAdapter.showPicker();
return completer.future;
} catch (_) {
_clearShowPickerOperation();
rethrow;
}
}