async def aget(self, key: str, collection: str = DEFAULT_COLLECTION) -> dict | None:
        """
        Get a value from the store.

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

        """
        raise NotImplementedError

        Get a value from the store.

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

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