Lists available marts in a readable DataFrame format.

        Returns:
            pd.DataFrame: Frame listing available marts.

def list_marts(self):
        """Lists available marts in a readable DataFrame format.

        Returns:
            pd.DataFrame: Frame listing available marts.
        """

        def _row_gen(attributes):
            for attr in attributes.values():
                yield (attr.name, attr.display_name)

        return pd.DataFrame.from_records(
            _row_gen(self.marts), columns=['name', 'display_name'])