code: func (m *Monitor) Position() (x, y float64) {
  	var xi, yi int
  	mainthread.Call(func() {
  		xi, yi = m.monitor.GetPos()
  	})
  	x = float64(xi)
  	y = float64(yi)
  	return
  }
docs: // Position returns the position of the upper-left corner of the Monitor in screen coordinates.