setSpeakerphoneOn method Null safety

Future<int> setSpeakerphoneOn(
  1. bool enable
)

Turn on or off the speaker phone

Implementation

Future<int> setSpeakerphoneOn(bool enable) async {
  IntValue reply = await _api.setSpeakerphoneOn(BoolValue()..value = enable);
  return reply.value ?? -1;
}