scovich commented on code in PR #8366:
URL: https://github.com/apache/arrow-rs/pull/8366#discussion_r2357522081


##########
parquet-variant-compute/src/variant_array.rs:
##########
@@ -351,6 +351,32 @@ impl ShreddedVariantFieldArray {
     pub fn inner(&self) -> &StructArray {
         &self.inner
     }
+
+    pub(crate) fn from_parts(
+        value: Option<BinaryViewArray>,
+        typed_value: Option<ArrayRef>,
+        nulls: Option<NullBuffer>,
+    ) -> Self {
+        let mut builder = StructArrayBuilder::new();
+        if let Some(value) = value.clone() {
+            builder = builder.with_field("value", Arc::new(value), true);
+        }
+        if let Some(typed_value) = typed_value.clone() {
+            builder = builder.with_field("typed_value", typed_value, true);
+        }
+        if let Some(nulls) = nulls {
+            builder = builder.with_nulls(nulls);
+        }
+
+        // This would be a lot simpler if ShreddingState were just a pair of 
Option... we already

Review Comment:
   Tho now that I look, shredding state constructor is infallible. We should 
change it to `new` instead of `try_new`



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