271         let parent = parent.rep();  in push_child()
284         let entry = self.occupied_mut(child.rep())?;  in add_child()
286         entry.parent = Some(parent.rep());  in add_child()
287         self.occupied_mut(parent.rep())?.add_child(child.rep());  in add_child()
297         let entry = self.occupied_mut(child.rep())?;  in remove_child()
298         assert_eq!(entry.parent, Some(parent.rep()));  in remove_child()
300         self.occupied_mut(parent.rep())?.remove_child(child.rep());  in remove_child()
309         self.get_(key.rep())?  in get()
325         self.get_any_mut(key.rep())?  in get_mut()
353         let entry = self.delete_entry(resource.rep(), debug)?;  in delete_maybe_debug()
401         let parent_entry = self.occupied(parent.rep())?;  in iter_children()
448     assert_eq!(x.rep(), 0);  in test_free_list()
451     assert_eq!(y.rep(), 1);  in test_free_list()
456     assert_eq!(x.rep(), 0);  in test_free_list()
463     assert_eq!(y.rep(), 1);  in test_free_list()
466     assert_eq!(x.rep(), 0);  in test_free_list()
470     assert_eq!(x.rep(), 2);  in test_free_list()