code: protected IterableDatasetFinder createDatasetsFinder(SourceState state) throws IOException {
      return DatasetUtils.instantiateIterableDatasetFinder(state.getProperties(),
          HadoopUtils.getSourceFileSystem(state), null);
    }
docs: Can be overriden to specify a non-pluggable {@link org.apache.gobblin.dataset.DatasetsFinder}.
  @throws IOException