Psecio\PropAuth\Subject::cannot PHP Метод

    public function cannot($policyName, $addl = null)
    {
        if ($addl !== null) {
            $addl = !is_array($addl) ? [$addl] : $addl;
        }
        $policy = $this->policies[$policyName];
        if ($policy === null) {
            throw new \InvalidArgumentException('Invalid policy name: ' . $policyName);
        }
        $enforcer = new Enforcer();
        return !$enforcer->evaluate($this->subject, $policy, $addl);
    }