def IndexTerms(self):
    assert self.col_def.indexer and \
        isinstance(self.col_def.indexer, indexers.SecondaryIndexer)
    update = self.Update()
    # Create the term dict.
    term_dict = {}
    if update.value is not None:
      for term in update.value:
        term_dict.update(self.col_def.indexer.Index(self.col_def, term).items())
    return db_client.UpdateAttr(value=term_dict, action=update.action)
Returns the set of index terms in conjunction with the action,
dataset/ETHPy150Open viewfinderco/viewfinder/backend/db/schema.py/_SetValue.IndexTerms