def METHOD_NAME(fc):
  """Returns a unique name for the feature column used during deduping.
  Without this two FeatureColumns that have the same name and where
  one wraps the other, such as an IndicatorColumn wrapping a
  SequenceCategoricalColumn, will fail to deserialize because they will have the
  same name in colums_by_name, causing the wrong column to be returned.
  Args:
    fc: A FeatureColumn.
  Returns:
    A unique name as a string.
  """
  return fc.__class__.__name__ + ':' + fc.name