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I have a golang grpc server. The metadata definition in grpc golang is a struct of map[string][]string, which can get a string list value with a given key.

but in my dart(flutter app) client, the dart grpc metadata definition is a struct of map<string, string>. Then I can only passing a string into metadata value

how can I set string list into metadata in grpc dart?

Antiphy Initializator
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    There's an [issue](https://github.com/grpc/grpc-dart/issues/627) on the GitHub repo for the Dart gRPC implementation that reflects this issue. Headers should support repeated string values. – DazWilkin Jun 29 '23 at 15:28

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