    def flush(self):
        """
        This method is triggered by RuntimePipeline.flush().

        After the pipeline runs, some operators may need to trigger some additional operations,
        such as the to_faiss operator needing to trigger data storage.
        """
        pass
This method is triggered by RuntimePipeline.flush().

After the pipeline runs, some operators may need to trigger some additional operations,
such as the to_faiss operator needing to trigger data storage.
towhee/operator/base.py