diff --git a/rainbowadn/data/collection/trees/binary/binarytreecreationprotocol.py b/rainbowadn/data/collection/trees/binary/binarytreecreationprotocol.py
index 78cc6c8..6380bb6 100644
--- a/rainbowadn/data/collection/trees/binary/binarytreecreationprotocol.py
+++ b/rainbowadn/data/collection/trees/binary/binarytreecreationprotocol.py
@@ -13,6 +13,7 @@ class BinaryTreeCreationProtocol(Generic[ActiveKeyType, MetaDataType, TreeType])
     def split(self, tree: TreeType) -> Optional[
         tuple[TreeType, HashPoint[ActiveKeyType], HashPoint[MetaDataType], TreeType]
     ]:
+        """result of this method is supposed to be used right after the call, therefore all values are resolved"""
         raise NotImplementedError
 
     def tree(self, treel: TreeType, treer: TreeType, key: HashPoint[ActiveKeyType]) -> TreeType: