def __init__(self, selector: str | int | None, parent: CommandGraphNode) -> None:
        """A container object in the command graph

        Parameters
        ----------
        selector: str | None
            The name of the selected element within the command graph.  If not
            given, corresponds to the default selection of this type of object.
        parent: CommandGraphNode
            The container object that this object is the child of.
        """
        self._selector = selector
        self._parent = parent
A container object in the command graph

        Parameters
        ----------
        selector: str | None
            The name of the selected element within the command graph.  If not
            given, corresponds to the default selection of this type of object.
        parent: CommandGraphNode
            The container object that this object is the child of.
        
libqtile/command/graph.py