title: Batch calls with Facebook Graph API & PHP
body: <p>Designing my first app against the Graph API, using version 2.1.2 of the Facebook supplied PHP library.  Trying to maximize performance, etc out of the box and want to batch a few calls together into one call, but can't find anything in the documentation...  I am sure I must be missing something simple, but am stumped.</p>
  
  <p>I'd like to turn these calls (just an example) into a single batched call:</p>
  
  <pre><code>$me     = $facebook-&gt;api('/me', $params);
  $groups = $facebook-&gt;api('/me/groups', $params);
  </code></pre>