def dependent_fields_names(self) -> Set[str]:
        """Return the names of all fields that are dependent fields of multimodal combination fields."""
        return self._cache_or_get('dependent_fields_names',
                                  lambda: {dependent_field for field in self.fields if field.dependent_fields
                                           for dependent_field in field.dependent_fields.keys()}
                                  )
Return the names of all fields that are dependent fields of multimodal combination fields.
src/marqo/core/models/marqo_index.py