sdf-jkl commented on code in PR #8600:
URL: https://github.com/apache/arrow-rs/pull/8600#discussion_r2445930992


##########
arrow-array/src/builder/generic_bytes_builder.rs:
##########
@@ -348,6 +348,40 @@ impl<O: OffsetSizeTrait> std::fmt::Write for 
GenericStringBuilder<O> {
     }
 }
 
+const AVERAGE_STRING_LENGTH: usize = 16;
+/// Trait for string-like array builders
+///
+/// This trait provides unified interface for builders that append string-like 
data
+/// such as [`GenericStringBuilder<O>`] and 
[`crate::builder::StringViewBuilder`]
+pub trait StringLikeArrayBuilder: ArrayBuilder {

Review Comment:
   I was not sure where to put it at first, but I don't think it has to be pub



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