framework/rbac/PhpManager.php
public function removeChildren($parent)
    {
        if (isset($this->children[$parent->name])) {
            unset($this->children[$parent->name]);
            $this->saveItems();
            return true;
        }

        return false;
    }
public function removeChildren($parent)
    {
        if (isset($this->children[$parent->name])) {
            unset($this->children[$parent->name]);
            $this->saveItems();
            return true;
        }

        return false;
    }
{@inheritdoc}