framework/rbac/BaseManager.php
public function getRole($name)
    {
        $item = $this->getItem($name);
        return $item instanceof Item && $item->type == Item::TYPE_ROLE ? $item : null;
    }
public function getRole($name)
    {
        $item = $this->getItem($name);
        return $item instanceof Item && $item->type == Item::TYPE_ROLE ? $item : null;
    }
{@inheritdoc}