getVolume method
@detail api @brief Gets the current volume. @param effectId Audio effect ID @return - >0: Success, the current volume value. - < 0: Failed. @note Call this API after start{@link #IAudioEffectPlayer#start}.
Implementation
FutureOr<int> getVolume(int effectId) async {
return await nativeCall('getVolume', [effectId]);
}