[undertow-dev] UndertowClient Multipart

I'm attempting to use the UndertowClient to send multipart/form-data to a server but I'm having trouble figuring out how to do so. I can't seem to find any examples or documentation of how to accomplish this. Any insights would be appreciated. I'm simply trying to encode a form POST into multipart/form-data to send to a server and get the response back.