Thank you for writing us back.
This feature is still under review, however in regard to your question grouping the data for the ListView items would be available only for NativeScript Anguler2 projects, because of the fact that angular2 supports data filters and will help the user to filter the data. While this feature is still under review as a temporary solution you could also use https://github.com/rajivnarayana/nativescript-sectioned-list-view
, which provides similar functionality.
I hope this information helps
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