kiszk commented on a change in pull request #7507:
URL: https://github.com/apache/arrow/pull/7507#discussion_r538208202



##########
File path: cpp/src/arrow/array/util.cc
##########
@@ -84,6 +283,12 @@ std::shared_ptr<Array> MakeArray(const 
std::shared_ptr<ArrayData>& data) {
   return out;
 }
 
+void SwapEndianArrayData(std::shared_ptr<ArrayData>& data) {
+  internal::ArrayDataEndianSwapper swapper_visitor(data, data->length);
+  DCHECK_OK(VisitTypeInline(*data->type, &swapper_visitor));
+  DCHECK_OK(swapper_visitor.SwapChildren((*data->type).fields()));

Review comment:
       @wesm I just keep this code as-is. This is because `SwapChildren()` is 
also called from`SwapType()`. Any comments are appreciated. 




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