code: func WmFullscreenMonitorsSet(xu *xgbutil.XUtil, win xproto.Window,
  	edges *WmFullscreenMonitors) error {
  
  	raw := make([]uint, 4)
  	raw[0] = edges.Top
  	raw[1] = edges.Bottom
  	raw[2] = edges.Left
  	raw[3] = edges.Right
  
  	return xprop.ChangeProp32(xu, win, "_NET_WM_FULLSCREEN_MONITORS",
  		"CARDINAL", raw...)
  }
docs: // _NET_WM_FULLSCREEN_MONITORS set