Method _noChange

/**
 * There is no change in page data so send an unmodified header and die gracefully
 *
 * @return  void
 *
 * @since   1.7.0
 */
protected function _noChange()
{
    $app = Factory::getApplication();
    // Send not modified header and exit gracefully
    $app->setHeader('Status', 304, true);
    $app->sendHeaders();
    $app->close();
}