*
     * @return the snapshot hierarchy without snapshots which can't be kept till the next build.
     */
    @CheckReturnValue
    SnapshotHierarchy updateVfsAfterBuildFinished(SnapshotHierarchy root);

    /**
     * Get statistics about the received changes.
     */
    FileWatchingStatistics getAndResetStatistics();

    /**
     * Configures debug logging.
     *