title: Firebase Android get value for unknown key
body: <p>I have a list of objects on my Firebase database, and the key for each object is a timestamp. I can get the last one using <code>limitToLast(1)</code>, and the data snapshot I get is:</p>
  
  <pre><code>{ key = time_stamps, value = {1510768441759={id=f454445c6e880df31e, coordinates={latitude=-4.1461734, longitude=20.5992437}}} }
  </code></pre>
  
  <p>Where <code>1510768441759</code> is the timestamp.</p>
  
  <p>How do I read the coordinates? I've tried to convert the value to a POJO, but I cannot, because the timestamp is unknown to me, and in a POJO it would be the name of a property…</p>
  
  <p>Thanks.</p>