close method

void close()

Stop receiving realtime data from server using Listening.stream.

Implementation

void close(){
  logger("CLOSE HAS BEEN SUCCESSFULLY CALLED!! $_closeHasBeenCalled");
  if(_closeHasBeenCalled) {
    return;
  }
  _closeHasBeenCalled = true;
  _subscription.cancel();
  childStreamController.close();
  _notifyParentStreamThatChildStreamIsNotListeningAnymore();
}