title: How do I perform a pagination query on Firebase's iOS SDK?
body: <p><img src="https://i.stack.imgur.com/0uBJY.png" alt="Firebase Model"></p>
  
  <p>This is my model. </p>
  
  <pre><code>messagesRef = Firebase(url: "https://"+CONSTANTS.FirebaseDB+".firebaseio.com/messages/1:1000")
      messagesRef.queryLimitedToLast(5).observeEventType(FEventType.ChildAdded, withBlock: { (snapshot) in
          self.message_list.append(snapshot) // it works.
      });
  });
  </code></pre>
  
  <p>My code works -- it gets the last 5 messages (8-12).</p>
  
  <p>However, what if I have a function query the next 5 messages (2-6)? With a start and offset. How can I query this? </p>