@Override
    public @NotNull Map<Integer, Void> map(@NotNull VcsShortCommitDetails inputData) {
      Int2ObjectMap<Void> result = new Int2ObjectOpenHashMap<>();
      try {
        result.put(myUserEnumerator.enumerate(inputData.getAuthor()), null);
      }
      catch (IOException e) {
        myFatalErrorConsumer.accept(e);
      }
      return result;
    }
@Override
    public @NotNull Map<Integer, Void> map(@NotNull VcsShortCommitDetails inputData)