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Feature request: overloads of StringValuesBuilder.appendAll accepting Map and Pair vararg

Feature request: overloads of StringValuesBuilder.appendAll accepting Map and Pair vararg: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). When building requests with Ktor I often end up with a Map<String, String (or Map<String, Iterable<String ) coming from…

The task

When building requests with Ktor I often end up with a `Map<String, String>` (or `Map<String, Iterable<String>>`) coming from config, query parsing, etc., and I want to dump the whole thing into `URLBuilder.parameters` or a headers builder in one line.

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.