protected function buildListenerChoices()
 {
     $listeners = array();
     foreach ($this->listener_chain->getListeners() as $alias => $listener) {
         $listeners[$alias] = $listener->getName();
     }
     return $listeners;
 }
 public function getFcListener($alias)
 {
     return $this->listener_chain->getListener($alias)->getName();
 }
 protected function addListener(FormBuilderInterface $builder, FcFormEventListener $fc_listener)
 {
     $listener = $this->listener_chain->getListener($fc_listener->getListener());
     $listener->buildListener($builder, $fc_listener);
 }