/**
  * @copydoc GridHandler::authorize()
  */
 function authorize($request, &$args, $roleAssignments)
 {
     import('lib.pkp.classes.security.authorization.ContextAccessPolicy');
     $this->addPolicy(new ContextAccessPolicy($request, $roleAssignments));
     return parent::authorize($request, $args, $roleAssignments, false);
 }