def _drop_sf_id_columns(self):
    for mapping in self.mappings.values():
        if mapping.get('oid_as_pk'):
            continue
        self.metadata.tables[mapping['sf_id_table']].drop()
def _drop_sf_id_columns(self):
    for mapping in self.mappings.values():
        if mapping.get('oid_as_pk'):
            continue
        self.metadata.tables[mapping['sf_id_table']].drop()