@Override
  public @NotNull DetailedLogData readFirstBlock(@NotNull VirtualFile root,
                                                 @NotNull Requirements requirements) throws VcsException {
    List<VcsCommitMetadata> commits = HgHistoryUtil.loadMetadata(myProject, root, requirements.getCommitCount(),
                                                                 Collections.emptyList());
    return new LogDataImpl(readAllRefs(root), commits);
  }
@Override
  public @NotNull DetailedLogData readFirstBlock(@NotNull VirtualFile root,
                                                 @NotNull Requirements requirements)