code: func WmHintsSet(xu *xgbutil.XUtil, win xproto.Window, hints *Hints) error {
  	raw := []uint{
  		hints.Flags, hints.Input, hints.InitialState,
  		uint(hints.IconPixmap), uint(hints.IconWindow),
  		uint(hints.IconX), uint(hints.IconY),
  		uint(hints.IconMask),
  		uint(hints.WindowGroup),
  	}
  	return xprop.ChangeProp32(xu, win, "WM_HINTS", "WM_HINTS", raw...)
  }
docs: // WM_HINTS set
  // Make sure to set the flags in the Hints struct correctly!