Loraserver Network-Controller doesn't compile

I’m trying to integrate a gRPC into my running loraserver using GO to run some simple mac-commands. I’m trying to run the example command from the site (DevStatusReq), but I can’t compile the file and get an error that says the line 18 ns.NetworkServerClient is undefined. after looking into the library in github I couldn’t find the class you are referring to. What should be the class instead of NetworkServerClient?