Function swapWindows

wm/window_manager.go:1388–1390

(arr *[]*Window, first int, last int)

	}
}
func swapWindows(arr *[]*Window, first int, last int) {
	(*arr)[first], (*arr)[last] = (*arr)[last], (*arr)[first]
}

func swapWindowsId(arr *[]*Window, first xproto.Window, last xproto.Window){
	var res1 int