/**
 * Rendering is the process of pushing the document buffers into the template
 * placeholders, retrieving data from the document and pushing it into
 * the application response buffer.
 *
 * @return  void
 *
 * @since   4.0.0
 *
 * @note    Rendering should be overridden to get rid of the theme files.
 */
protected function render()
{
    // Render the document
    $this->setBody($this->document->render($this->allowCache()));
}