/**
* Instantiate the controller.
*
* @param \JInput $input The input object.
* @param \JApplicationCms $app The application object.
* @param array $config The config object.
*/
public function __construct(\JInput $input = null, \JApplicationCms $app = null, $config = array())
{
parent::__construct($input, $app, $config);
$this->key = $this->key ?: ArrayHelper::getValue($config, 'key');
$this->urlVar = $this->urlVar ?: ArrayHelper::getValue($config, 'urlVar');
}
