playSoundEffect method Null safety

Future<void> playSoundEffect(
  1. AndroidSoundEffectType effectType,
  2. {double? volume}
)

(UNTESTED)

Implementation

Future<void> playSoundEffect(AndroidSoundEffectType effectType,
    {double? volume}) async {
  // TODO: support variant with userId parameter.
  await _channel.invokeMethod('playSoundEffect', [effectType.index, volume]);
}