title: Check if a role is granted for a specific user in Symfony2 ACL
body: <p>I want to check if a role is granted for a specific user in Symfony2 (not the logged user).
  I know that I can check it for the logged user by: </p>
  
  <pre><code>$securityContext = $this-&gt;get('security.context');
  
  if (false === $securityContext-&gt;isGranted('VIEW', $objectIdentity)) {
          //do anything
  }
  </code></pre>
  
  <p>but if I'm the logged user and I wand to check other user if <strong>isGranted</strong> ??</p>