isPlayingStream method
Implementation
bool isPlayingStream(String streamID) {
final index = playingStreamListNotifier.value.indexWhere(
(e) => e.streamID == streamID,
);
if (-1 == index) {
return false;
}
return playingStreamListNotifier.value[index].stateNotifier.value !=
ZegoPlayerState.NoPlay;
}