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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 reload(self):
 """Reload this database. Refresh any configured schema into :attr:`ddl_statements`. See https://cloud.google.com/spanner/reference/rpc/google.spanner.admin.database.v1#google.spanner.admin.database.v1.DatabaseAdmin.GetDatabaseDDL :raises NotFound: if the database does not exist """

        api = self._instance._client.database_admin_api
        metadata = _metadata_with_prefix(self.name)
        response = api.get_database_ddl(self.name, metadata=metadata)
        self._ddl_statements = tuple(response.statements)