Method _pre_detach

xarray/core/treenode.py:504–506

Method call before detaching from `parent`.

(self, parent: Self)

        return len([node for node in self.root.subtree if node.level == self.level])

    def _pre_detach(self, parent: Self) -> None:
        """Method call before detaching from `parent`."""
        pass

    def _post_detach(self, parent: Self) -> None:
        """Method call after detaching from `parent`."""