def add_client(self, client: Window) -> None:
        """Called whenever a window is added to the group

        Called whether the layout is current or not. The layout should just add
        the window to its internal datastructures, without mapping or
        configuring.
        """
Called whenever a window is added to the group

        Called whether the layout is current or not. The layout should just add
        the window to its internal datastructures, without mapping or
        configuring.
        
libqtile/layout/base.py