@Override
    protected FileLocalStringEnumerator createStubIndexKeySerializationState(@NotNull DataInput input, int stubIndexKeyCount)  throws IOException {
      FileLocalStringEnumerator enumerator = new FileLocalStringEnumerator(false);
      enumerator.read(input);
      return enumerator;
    }
@Override
    protected FileLocalStringEnumerator createStubIndexKeySerializationState(@NotNull DataInput input, int stubIndexKeyCount)