brought back abstract method

magic/self_query_retriever.py

@@ -100,6 +100,9 @@ class SelfQueryRetriever(BaseRetriever, BaseModel):
         docs = self.vectorstore.search(
             query, self.search_type, **search_kwargs)
         return docs
+    
+    async def aget_relevant_documents(self, query: str) -> List[Document]:
+        raise NotImplementedError
 
     @classmethod
     def from_llm(