protected function appendage($appends)
        {
            // The developer may assign an array of values that will be converted to a
            // query string and attached to every pagination link. This allows simple
            // implementation of sorting or other things the developer may need.
            if (!is_null($this->appendage)) {
                return $this->appendage;
            }

            if (count($appends) <= 0) {
                return $this->appendage = '';
            }

            return $this->appendage = '&' . http_build_query($appends);
        }