Whether this tree should be highlighted during visualization
The identifier for this tree.
The identifier for this tree.
Note that this is unique only for RefTree.Ref. For RefTree.Null it is always null
,
and value (RefTree.Val) identifiers are shared across all equivalent values.
Convert to a field usable in other trees
Convert to a field usable in other trees
Add or remove highlighting
Add or remove highlighting
A special case RefTree for
null
values.