def async_client(self) -> weaviate.WeaviateAsyncClient:
        """Get the asynchronous Weaviate client, if available."""
        if self._aclient is None:
            raise AsyncClientNotProvidedError
        return self._aclient
Get the asynchronous Weaviate client, if available.
llama-index-integrations/vector_stores/llama-index-vector-stores-weaviate/llama_index/vector_stores/weaviate/base.py