/**
     * Updates the watchers after changes to the root.
     *
     * @see FileWatcherRegistry#virtualFileSystemContentsChanged(Collection, Collection, SnapshotHierarchy)
     */
    void virtualFileSystemContentsChanged(Collection<FileSystemLocationSnapshot> removedSnapshots, Collection<FileSystemLocationSnapshot> addedSnapshots, SnapshotHierarchy root);

    /**

    /**
     * Updates the watchers after changes to the root.
     *
     * @throws WatchingNotSupportedException when the native watchers can't be updated.
     */
    void virtualFileSystemContentsChanged(Collection<FileSystemLocationSnapshot> removedSnapshots, Collection<FileSystemLocationSnapshot> addedSnapshots, SnapshotHierarchy root);

    /**
     * Updates the VFS and the watchers when the build started.
     *

            newRoot = invalidator.invalidate(movedDirectory.getAbsolutePath(), newRoot);
        }
        return newRoot;
    }

    @Override
    public void virtualFileSystemContentsChanged(Collection<FileSystemLocationSnapshot> removedSnapshots, Collection<FileSystemLocationSnapshot> addedSnapshots, SnapshotHierarchy root) {