Nette\Security\Permission::getRules PHP Метод

    private function &getRules($resource, $role, $create = FALSE)
    {
        $null = NULL;
        if ($resource === self::ALL) {
            $visitor =& $this->rules['allResources'];
        } else {
            if (!isset($this->rules['byResource'][$resource])) {
                if (!$create) {
                    return $null;
                }
                $this->rules['byResource'][$resource] = [];
            }
            $visitor =& $this->rules['byResource'][$resource];
        }
        if ($role === self::ALL) {
            if (!isset($visitor['allRoles'])) {
                if (!$create) {
                    return $null;
                }
                $visitor['allRoles']['byPrivilege'] = [];
            }
            return $visitor['allRoles'];
        }
        if (!isset($visitor['byRole'][$role])) {
            if (!$create) {
                return $null;
            }
            $visitor['byRole'][$role]['byPrivilege'] = [];
        }
        return $visitor['byRole'][$role];
    }