def save_last_sync(self, ids, process):
        try:
            spec = {'_id': 'last_sync'}
            document = {'$set': {process: ids}}
            self.db.internal.update(spec, document, upsert=True)
        except Exception as e:
            raise DatabaseException(e)
def __init__(self, masked_tokens=None, name='accuracy', dtype=None):
    self._masked_tokens = masked_tokens or []
    super().__init__(name, dtype=dtype)