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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def materialize(self, ref, table_name=None, index_columns=None, logger=None):
 """ Creates materialized table for given partition reference. Args: ref (str):
 id, vid, name or vname of the partition. Returns: str: name of the partition table in the database. """

        from ambry.library import Library
        assert isinstance(self._library, Library)

        logger.debug('Materializing warehouse partition.\n    partition: {}'.format(ref))
        partition = self._library.partition(ref)

        connection = self._backend._get_connection()

        return self._backend.install(connection, partition, table_name=table_name,
                                     index_columns=index_columns, materialize=True, logger=logger)