*
     * @see FileWatcherRegistry#updateVfsBeforeBuildFinished(SnapshotHierarchy, int, List)
     */
    @CheckReturnValue
    SnapshotHierarchy updateVfsBeforeAfterFinished(SnapshotHierarchy root);

    /**
     * The files actually being watched right now.
     *
     * @see FileWatcherUpdater
     */
    FileHierarchySet getWatchedFiles();

        );

        if (root != newRoot) {
            update(newRoot);
        }
        return newRoot;
    }

    @Override
    public SnapshotHierarchy updateVfsBeforeAfterFinished(SnapshotHierarchy root) {
        SnapshotHierarchy newRoot = WatchableHierarchies.removeUnwatchableContentAfterBuildFinished(
            root,
            createInvalidator()
        );