/**
  * Determine changes between two directions of the same route with the same tag
  *
  * @param Direction $o
  * @param Direction $n
  * @return Array - of changes
  */
 protected function dataUpdated(Direction $o, Direction $n)
 {
     $changes = array();
     if ($o->getName() != $n->getName()) {
         $changes["name"] = $o->getName() . " | " . $n->getName();
     }
     if ($o->getTitle() != $n->getTitle()) {
         $changes["title"] = $o->getTitle() . " | " . $n->getTitle();
     }
     if ($o->getUseForUi() != $n->getUseForUi()) {
         $changes["useForUI"] = $o->getUseForUi() . " | " . $n->getUseForUi();
     }
     return $changes;
 }