alamb commented on code in PR #8315:
URL: https://github.com/apache/arrow-rs/pull/8315#discussion_r2341541129


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parquet/src/arrow/arrow_reader/filter.rs:
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@@ -172,7 +172,7 @@ where
 /// [`RowSelection`]: crate::arrow::arrow_reader::RowSelection
 pub struct RowFilter {
     /// A list of [`ArrowPredicate`]
-    pub(crate) predicates: Vec<Box<dyn ArrowPredicate>>,
+    pub predicates: Vec<Box<dyn ArrowPredicate>>,

Review Comment:
   Instead of making this pub, can you please make an accessor so we can change 
the internals of RowFilter without causing a breaking API change? 
   
   Perhaps something like
   ```rust
   impl RowFilter {
     pub fn predicate(&self) -> &Vec<Box<dyn ArrowPredicate>> { .. }
     // and convert into the innner
     pub fn into_predicates(self) -> Vec<Box<dyn ArrowPredicate>> { .. }
   }
   ```



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