protected function getFromClause(): string 
    {
        return "FROM ".self::TABLE_NAME." JOIN ".self::ROLES_JOIN_TABLE_NAME." ON ".self::TABLE_NAME.".id = ".self::ROLES_JOIN_TABLE_NAME.".permission_id JOIN ".self::ROLES_TABLE_NAME." ON ".self::ROLES_JOIN_TABLE_NAME.".role_id=".self::ROLES_TABLE_NAME.".id";
    }