我可以从Mongo查询中读取响应标头吗？

I am using the mgo driver to connect to CosmosDB. Mgo works fine, but we are having some scale issues. Azure returns a header (x-ms-request-charge) that lets you know how expensive a query is.

Is there a way to look at the response headers from a Mongo query in mgo? Something like:

session := s.Session.Copy()
defer session.Close()

collection := session.DB(s.DBName).C("documents")

result := &MyCoolDocument{}
err := collection.FindId(id).One(result)
response := collection.LastResponse() // Made up
fmt.Println(response.Headers()) // Made up