def delete(self, key: str, collection: str = DEFAULT_COLLECTION) -> bool:
        """
        Delete a value from the store.

        Args:
            key (str): key
            collection (str): collection name

        """
        client = self.get_sync_client()
        result = client.query(
            DELETE_QUERY,
            key=key,
            namespace=collection,
        )
        return len(result) > 0

        Delete a value from the store.

        Args:
            key (str): key
            collection (str): collection name

        
llama-index-integrations/storage/kvstore/llama-index-storage-kvstore-gel/llama_index/storage/kvstore/gel/base.py