/**
  * @param $user
  **/
 static function showAddEmailButton(User $user)
 {
     $users_id = $user->getID();
     if (!$user->can($users_id, READ) && $users_id != Session::getLoginUserID()) {
         return false;
     }
     $canedit = $user->can($users_id, UPDATE) || $users_id == Session::getLoginUserID();
     parent::showAddChildButtonForItemForm($user, '_useremails', $canedit);
     return;
 }