/**
* @inherit doc
*/
public function init()
{
$this->validateSourceData();
$this->_module = Config::initModule(Module::classname());
$this->initSelectedNode();
if (empty($this->emptyNodeMsg)) {
$this->emptyNodeMsg = Yii::t('kvtree', 'No valid tree nodes are available for display. Use toolbar buttons to add tree nodes.');
}
parent::init();
}
