aharui commented on issue #593: AdvancedDataGrid, groupedColumns does not work URL: https://github.com/apache/royale-asjs/issues/593#issuecomment-569870691 OK, the reason it isn't running for you is that you have to use the `-js-dynamic-access-unknown-members` compiler option because you are using plain objects in the example and the minifier will rename the field names without that option. Here's the compiler command-line that worked for me: `js/bin/mxmlc +configname=flex -js-dynamic-access-unknown-members src/ADGColumnGroup.mxml` Adding that option will make your code larger. Some people have different opinions, but in my opinion the best practice in Royale is to not use plain objects and create data classes instead. Then you won't need that compiler option. Adding data classes will also make your code bigger, but it I think it can also make it smaller depending on how many accesses there are to the object's properties. But with data classes you will also get compiler checking that you didn't mis-type a property name and various data-binding warnings will go away, which should improve your productivity.
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