package builder // Add 添加一个索引项 //func (ib *IndexBuilder) Add(key string, sort mdbc.KeySort) *IndexBuilder { // ib.d = append(ib.d, bson.E{Key: key, Value: sort}) // return ib //} // Build 构建完整索引 //func (ib *IndexBuilder) Build() bson.D { // return ib.d //}