Not true it may not be a server mod like CUI it shows the world edit selection on a server running humid with world edit.
Or it may be a better FPS shower that toggles by command.
Something like a furnace and another like the droppers GUI I know I need a TE and a GUI but the tutorials I have found just say do this and that but don't tell me what it does.
I don't have any coding or log because I need help to start on that but the API would crash because it would call on build craft which is not installed.