Dataweave Script for Grouping Multiple Value of Same Key

Id,Value
1,a
2,b
3,c
1,d
2,e
3,f
1,g

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Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store