public function makeRef()
    {
        $data = array();
        foreach ($this->_items as $item) {
            $data[] = $item->makeRef();
        }

        return $data;
    }
public function makeRef()
    {
        $data = array();
        foreach ($this->_items as $item) {
            $data[] = $item->makeRef();
        }

        return $data;
    }
public function makeRef ( ) { $ data = array ( ) ; foreach ( $ this -> _items as $ item ) { $ data [ ] = $ item -> makeRef ( ) ; } return $ data ; }
make a MongoRefs array of items

@return \MongoDbRef[]
make a MongoRefs array of items