I've been getting this error when I try to build my application that imports 

"github.com/mongodb/mongo-go-driver/mongo"

command-line-arguments
./genepool.go:50:17: undefined: mongo.TransformDocument

**I have my GOPATH set up correctly to find the other mongo-go-driver packages and it builds if I remove the code that uses mongo.TransformDocument()

I originally saw this when I was trying to build my app in Docker. I couldn't reproduce it locally until I uninstalled and re-installed go-mongo-driver, then it started happening.

I'm thinking this is a bug that was introduced recently. Unfortunately I am not sure what version I was on before.