langchain/memory/chat_message_histories/zep.py/ZepChatMessageHistory/clear
class ZepChatMessageHistory:    def clear(self) -> None:
        """Clear session memory from Zep. Note that Zep is long-term storage for memory
        and this is not advised unless you have specific data retention requirements.
        """
        try:
            self.zep_client.delete_memory(self.session_id)
        except NotFoundError:
            logger.warning(
                f"Session {self.session_id} not found in Zep. Skipping delete."
            )