code: func CreateCursor(xu *xgbutil.XUtil, cursor uint16) (xproto.Cursor, error) {
  	return CreateCursorExtra(xu, cursor, 0, 0, 0, 0xffff, 0xffff, 0xffff)
  }
docs: // CreateCursor sets some default colors for nice and easy cursor creation.
  // Just supply a cursor constant from 'xcursor/cursordef.go'.