/**
  * {@inheritdoc}
  */
 public function getOptions(Hub $hub, $mode)
 {
     if ($mode == "subscribe" || $mode == "unsubscribe") {
         return array("digest" => $this->digestDefault);
     } else {
         return parent::getOptions($hub, $mode);
     }
 }
 /**
  * {@inheritdoc}
  */
 public function getOptions(Hub $hub, $mode)
 {
     if ($mode == 'subscribe' || $mode == 'unsubscribe') {
         return array('topic' => null);
     } else {
         return parent::getOptions($hub, $mode);
     }
 }