@Nullable
    private SvnRepositoryContentRevision createRevision(final SvnRepositoryContentRevision previousRevision, final boolean isDir) {
      return previousRevision == null ? null :
             SvnRepositoryContentRevision.create(myVcs, previousRevision.getFullPath(),
                                                 VcsUtil.getFilePath(previousRevision.getFile().getPath(), isDir),
                                                 previousRevision.getRevisionNumber().getRevision().getNumber());
    }
@Nullable
    private SvnRepositoryContentRevision createRevision(final SvnRepositoryContentRevision previousRevision, final boolean isDir)