Lowers window to the bottom of the Z-order (stacking order), so that other windows with the same parent window appear above window. This is true whether or not the other windows are visible.

If window is a toplevel, the window manager may choose to deny the request to move the window in the Z-order, Window.lower only requests the restack, does not guarantee it.

Note that raises the window again, so don’t call this function before (Try Window.showUnraised.)

class Window