code: func DesktopGeometryGet(xu *xgbutil.XUtil) (*DesktopGeometry, error) {
  	geom, err := xprop.PropValNums(xprop.GetProperty(xu, xu.RootWin(),
  		"_NET_DESKTOP_GEOMETRY"))
  	if err != nil {
  		return nil, err
  	}
  
  	return &DesktopGeometry{Width: int(geom[0]), Height: int(geom[1])}, nil
  }
docs: // _NET_DESKTOP_GEOMETRY get