List<Path> findAllDescendantStreamFileList(final Path parent) {
        List<Path> rtn = new ArrayList<>();
        List<Path> kids = findChildStreamFileList(parent);
        for (Path kid : kids) {
            rtn.add(kid);
            rtn.addAll(findAllDescendantStreamFileList(kid));
        }
        return rtn;
    }
Find all the descendants to this file.
stroom-data/stroom-data-store-impl-fs/src/main/java/stroom/data/store/impl/fs/FsPathHelper.java