async def async_add(
        self,
        nodes: Sequence[BaseNode],
        **kwargs: Any,
    ) -> List[str]:
        """
        Asynchronously add nodes to vector store.
        NOTE: this is not implemented for all vector stores. If not implemented,
        it will just call add synchronously.
        """
        return self.add(nodes, **kwargs)

        Asynchronously add nodes to vector store.
        NOTE: this is not implemented for all vector stores. If not implemented,
        it will just call add synchronously.
        
llama-index-core/llama_index/core/vector_stores/types.py