docarray
diff --git a/Collapse file
‎docarray/index/abstract.py‎
Copy file name to clipboardExpand all lines: docarray/index/abstract.py
+2Lines changed: 2 additions & 0 deletions b/Collapse file
‎docarray/index/abstract.py‎
Copy file name to clipboardExpand all lines: docarray/index/abstract.py
+2Lines changed: 2 additions & 0 deletions
@@ -1167,6 +1167,7 @@ def _get_root_doc_id(self, id: str, root: str, sub: str) -> str:
             )
             return self._get_root_doc_id(cur_root_id, root, '')
 
+    @abstractmethod
     def __contains__(self, item: BaseDoc) -> bool:
         """Checks if a given BaseDoc item is contained in the index.
 
@@ -1175,6 +1176,7 @@ def __contains__(self, item: BaseDoc) -> bool:
         """
         ...
 
+    @abstractmethod
     def _get_all_documents(self) -> Union[AnyDocArray, List]:
         """Retrieve all documents from the index