title: Firebase pop() as opposite to push()?
body: <p>I'd like to implement a stack (queue) that many users can push() to and many can pop() from in a FILO manner.</p>
  
  <p>Is there an equivalent to <code>pop()</code> method to retrieve/remove the last item of the list?</p>
  
  <p>For example:</p>
  
  <pre><code>var popRef = firebaseRef.pop();
  </code></pre>