code: private void showNextSuperToast() {
          // Do nothing if the queue is empty
          if (superToastPriorityQueue.isEmpty()) return;
  
          // Get next SuperToast in the queue
          final SuperToast superToast = superToastPriorityQueue.peek();
          if (!superToast.isShowing()) {
              final Message message = obtainMessage(Messages.DISPLAY_SUPERTOAST);
              message.obj = superToast;
              sendMessage(message);
          }
      }
docs: Show the next SuperToast in the current queue. If a SuperToast is currently showing,
  do nothing. The currently showing SuperToast will call this method when it dismisses.