public List<VersionSummaryDto> getVersionSummaryInBatch(final List<RepositoryFileDto> files) {
   List<VersionSummaryDto> versions = new ArrayList<VersionSummaryDto>(files.size());
   for (RepositoryFileDto file : files) {
     versions.add(
         versionSummaryAdapter.marshal(repo.getVersionSummary(file.getId(), file.getVersionId())));
   }
   return versions;
 }
 public VersionSummaryDto getVersionSummary(String fileId, String versionId) {
   return versionSummaryAdapter.marshal(repo.getVersionSummary(fileId, versionId));
 }