/**
  * Specifies that we only return ticketGroups that are for parking.
  */
 public function accept()
 {
     if (parent::current()->type == 'parking') {
         return true;
     }
     return false;
 }
 /**
  * Only return certain ticketGroups
  */
 public function accept()
 {
     if (parent::current()->in_hand === $this->inHand) {
         return true;
     }
     return false;
 }
 /**
  * Only return certain ticketGroups
  */
 public function accept()
 {
     if (parent::current()->eticket === $this->eTicket) {
         return true;
     }
     return false;
 }
 /**
  * Only return certain ticketGroups
  */
 public function accept()
 {
     if (parent::current()->featured === $this->featured) {
         return true;
     }
     return false;
 }