This single file was pulled from the repository at

https://github.com/docker/cli

with the path

cli/compose/types/types.go

This single file is vendored to avoid a dependency on the whole docker cli repository.

This file is from revision 6511da877f00e8b4f583ca5f1473a8b59cb37523.

unmarshal.go is supplementary to assist in unmarshalling yaml files of those types.