Returns an `OriginalFeatureList` for the specified feature_name.

  Args:
    example: An example.
    feature_name: A string feature name.

  Returns:
    A filled in `OriginalFeatureList` object representing the feature.

def parse_original_feature_from_example(example, feature_name):
  """Returns an `OriginalFeatureList` for the specified feature_name.

  Args:
    example: An example.
    feature_name: A string feature name.

  Returns:
    A filled in `OriginalFeatureList` object representing the feature.
  """
  feature = get_example_features(example)[feature_name]
  feature_type = feature.WhichOneof('kind')
  original_value = proto_value_for_feature(example, feature_name)

  return OriginalFeatureList(feature_name, original_value, feature_type)