code: public void save (FileSystemDataset dataset, State state) {
      state.setProp(SERIALIZE_COMPACTION_FILE_PATH_NAME, dataset.datasetURN());
    }
docs: Serialize a dataset {@link FileSystemDataset} to a {@link State}
  @param dataset A dataset needs serialization
  @param state   A state that is used to save {@link org.apache.gobblin.dataset.Dataset}