MongoHybrid\Mongo::save PHP Method

    public function save($collection, &$data)
    {
        if (isset($data["_id"]) && is_string($data["_id"])) {
            $data["_id"] = new \MongoId($data["_id"]);
        }
        $ref = $data;
        $return = $this->getCollection($collection)->save($ref);
        if (isset($ref["_id"])) {
            $ref["_id"] = (string) $ref["_id"];
        }
        $data = $ref;
        return $return;
    }