Security/Voter/BlacklistVoter.php
protected function voteOnAttribute($attribute, $subject, TokenInterface $token)
    {
        /** @var $subject Query */
        return $this->isLoggedInUser($token) || !$this->inList($subject->getName());
    }
protected function voteOnAttribute($attribute, $subject, TokenInterface $token)
    {
        /** @var $subject Query */
        return $this->isLoggedInUser($token) || !$this->inList($subject->getName());
    }
Perform a single access check operation on a given attribute, subject and token.

@param string         $attribute
@param mixed          $subject
@param TokenInterface $token

@return bool