title: In firebase, how do I retrieve the uid that was automatically created when pushing?
body: <p>how do I retrieve the uid (automatically created) as the id of the object itself, so later I can find the object and update its child properties (if any). Thanks. </p>
  
  <p>For example: </p>
  
  <pre><code>mFirebaseDatabaseReference.child(OBJ_CHILD).push().setValue(friendlyObject);  
  // I know this process will create a uid for the newly pushed object, and I want to get the uid of the bucket.
  </code></pre>