@Nullable
  public CommittedChangeList loadRevisions(VirtualFile vf, @NotNull VcsRevisionNumber number) {
    return VcsSynchronousProgressWrapper.compute(() -> {
      CommittedChangesProvider<? extends CommittedChangeList, ?> provider = getCommittedChangesProvider();
      Pair<? extends CommittedChangeList, FilePath> pair = provider == null ? null : provider.getOneList(vf, number);
      return pair == null ? null : pair.getFirst();
    }, getProject(), VcsBundle.message("title.load.revision.contents"));
  }
@Nullable
  public CommittedChangeList loadRevisions(VirtualFile vf, @NotNull VcsRevisionNumber number)