@Nullable
  private SvnLazyPropertyContentRevision createPropertyRevision(@NotNull FilePath filePath,
                                                                @Nullable ContentRevision revision,
                                                                @NotNull Url url) {
    if (revision == null) return null;

    SvnRevisionNumber number = (SvnRevisionNumber)revision.getRevisionNumber();
    Target target = Target.on(url, number.getRevision());
    return new SvnLazyPropertyContentRevision(myVcs, filePath, number, target);
  }
@Nullable
  private SvnLazyPropertyContentRevision createPropertyRevision(@NotNull FilePath filePath,
                                                                @Nullable ContentRevision revision,
                                                                @NotNull Url url)