code: func minMaxKeycodeGet(xu *xgbutil.XUtil) (xproto.Keycode, xproto.Keycode) {
  	return xu.Setup().MinKeycode, xu.Setup().MaxKeycode
  }
docs: // minMaxKeycodeGet a simple accessor to the X setup info to return the
  // minimum and maximum keycodes. They are typically 8 and 255, respectively.