/**
* Ensure the root directory exists.
*
* @param string $root root directory path
*
* @return string real path to root
*/
protected function ensureDirectory($root)
{
$root = $this->wrapPath($root);
return parent::ensureDirectory($root);
}
/**
* @inheritdoc
*/
protected function ensureDirectory($root)
{
return parent::ensureDirectory(Yii::getAlias($root));
}