yii\rbac\DbManager::getItems PHP Method

    protected function getItems($type)
    {
        $query = (new Query())->from($this->itemTable)->where(['type' => $type]);
        $items = [];
        foreach ($query->all($this->db) as $row) {
            $items[$row['name']] = $this->populateItem($row);
        }
        return $items;
    }