switchState method
switch userID
camera state, if userID
is empty, then it refers to local user
Implementation
void switchState({String? userID}) {
final targetUserID = userID ?? ZegoUIKit().getLocalUser().id;
final currentCameraState =
ZegoUIKit().getCameraStateNotifier(targetUserID).value;
turnOn(!currentCameraState, userID: targetUserID);
}