setVolume method
Set volume of next utterance
Implementation
@override
Future<bool?> setVolume(num volume) {
try {
if (utterance != null) {
utterance!.volume = volume;
return Future<bool>.value(true);
}
} catch (e) {
print('setVolume() error: ${e.toString()}');
}
return Future<bool>.value(false);
}