main.dart

@override
void describeSemanticsConfiguration(SemanticsConfiguration config) {
  super.describeSemanticsConfiguration(config);

  config
    ..label =
        'Analog clock showing hour $hour${_use24HourFormat ? ' (and ${hour + 12})' : ''}, '
            'minute $minute, and second $second'
    ..isReadOnly = true
    ..textDirection = TextDirection.ltr;
}