public Long handleAsAncestorOfChild(String childPath, VersionHierarchy child) {
                return child.getMaxVersionInHierarchy();
            }

            @Override
            public Long handleExactMatchWithChild(VersionHierarchy child) {
                return child.getMaxVersionInHierarchy();
            }

            @Override
            public Long handleUnrelatedToAnyChild() {

        return relativePath.isEmpty()
            ? rootNode.getMaxVersionInHierarchy()
            : rootNode.getVersion(relativePath, caseSensitivity);
    }

    /**
     * Creates a new hierarchy with an updated version at the location.
     */
    @CheckReturnValue
    public VersionHierarchyRoot updateVersion(String location) {
        long newVersion = rootNode.getMaxVersionInHierarchy() + 1;