public function render()
        {
            // If the content is a stringable object, we'll go ahead and call
            // the toString method so that we can get the string content of
            // the content object. Otherwise we'll just cast to string.
            if (str_object($this->content)) {
                $this->content = $this->content->__toString();
            } else {
                $this->content = (string) $this->content;
            }

            // Once we obtain the string content, we can set the content on
            // the HttpFoundation's Response instance in preparation for
            // sending it back to client browser when all is finished.
            $this->foundation->setContent($this->content);

            return $this->content;
        }