tustvold commented on code in PR #5149:
URL: https://github.com/apache/arrow-rs/pull/5149#discussion_r1409311037


##########
arrow-schema/src/fields.rs:
##########
@@ -99,6 +100,93 @@ impl Fields {
                 .all(|(a, b)| Arc::ptr_eq(a, b) || a.contains(b))
     }
 
+    /// Performs a depth-first scan of [`Fields`] filtering the [`FieldRef`] 
with no children
+    ///
+    /// Invokes `filter` with each leaf [`FieldRef`], i.e. one containing no 
children, and a

Review Comment:
   I'm sure this could be expressed better, but I struggled to come up with 
something :sweat_smile: 



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