def delete(self, ref_doc_id: str, **delete_kwargs: Any) -> None:
        """
        Delete node from the vector store.

        Args:
            ref_doc_id: Reference doc id of the node to delete.
            delete_kwargs: Additional arguments to pass to the delete method.

        """
        raise NotImplementedError(
            "Delete is not currently supported, but will be in the future."
        )

        Delete node from the vector store.

        Args:
            ref_doc_id: Reference doc id of the node to delete.
            delete_kwargs: Additional arguments to pass to the delete method.

        
llama-index-integrations/vector_stores/llama-index-vector-stores-upstash/llama_index/vector_stores/upstash/base.py