This came about because I wanted to have concurrent maps but felt bad about casting out of them.

To re-generate the gen-conmaps.go with updates from conmaps.go:

go get github.com/justnoise/genny
cd $GOPATH/src/github.com/justnoise/genny
go install
cd $GOPATH/src/github.com/elotl/itzo/pkg/util/conmap
go generate

Note: Don't use github.com/cheekybits/genny for code generation. The original genny didn't handle many things well since it doesn't do real parsing (e.g. make([]NodeKeyTypeValueType when KeyType=string). So use the justnoise version of genny since it has been updated to parse the go source code.