peter-toth commented on code in PR #13467:
URL: https://github.com/apache/datafusion/pull/13467#discussion_r1848077369


##########
datafusion/common/src/tree_node.rs:
##########
@@ -769,6 +770,263 @@ impl<T> Transformed<T> {
     }
 }
 
+/// [`Container`] contains elements that a function can be applied on or 
mapped. The
+/// elements of the container are siblings so the continuation rules are 
similar to
+/// [`TreeNodeRecursion::visit_sibling`] / [`Transformed::transform_sibling`].
+pub trait Container<'a, T: 'a>: Sized {

Review Comment:
   Yeah, indeed that's a better name for container. Let me change it.



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