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ServiceExtensionCallback should accept arbitrary json object instead of Map #183017

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ServiceExtensionCallback should accept arbitrary json object instead of Map#183017
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P2Important issues not at the top of the work listc: proposalA detailed proposal for a change to Flutterframeworkflutter/packages/flutter repository. See also f: labels.team-frameworkOwned by Framework teamtriaged-frameworkTriaged by Framework team

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@chunhtai
chunhtai
opened on Feb 27, 2026

https://api.flutter.dev/flutter/foundation/ServiceExtensionCallback.html

It currently accept Map as return type, but that is not necessary. We should be able to change it to accept any json object.

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    P2Important issues not at the top of the work listc: proposalA detailed proposal for a change to Flutterframeworkflutter/packages/flutter repository. See also f: labels.team-frameworkOwned by Framework teamtriaged-frameworkTriaged by Framework team

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