FOS\UserBundle\Model\User::getGroups PHP 메소드

    public function getGroups()
    {
        return $this->groups ?: ($this->groups = new ArrayCollection());
    }

 /**
  * Gets the groups granted to the user.
  *
  * @return Collection
  */
 public function getSecurityGroups()
 {
     return parent::getGroups();
 }