Icicle\Observable\Internal\EmitQueue::decrement PHP Method

    public function decrement()
    {
        if (0 >= --$this->listeners && null !== $this->observable) {
            $this->observable->dispose(new AutoDisposedException());
        }
    }

 /**
  * Removes queue from collection.
  */
 public function __destruct()
 {
     if (null !== $this->placeholder) {
         $this->placeholder->ready();
     }
     $this->queue->decrement();
 }