scovich commented on code in PR #8208:
URL: https://github.com/apache/arrow-rs/pull/8208#discussion_r2296037432
##########
parquet-variant/src/builder.rs:
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@@ -589,14 +675,14 @@ enum ParentState<'a> {
Variant {
value_builder: &'a mut ValueBuilder,
saved_value_builder_offset: usize,
- metadata_builder: &'a mut MetadataBuilder,
+ metadata_builder: &'a mut dyn MetadataBuilder,
Review Comment:
I suppose we could also avoid generics altogether by defining our own
versions of `Any` and `AsAny` that preserve lifetime info... but they would
become part of the public arrow-rs API which seems awkward.
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