HeartSaVioR commented on issue #22282: [SPARK-23539][SS] Add support for Kafka headers in Structured Streaming URL: https://github.com/apache/spark/pull/22282#issuecomment-513956104 Nice catch. Even for interface `Headers` it defines the behavior of iterable, and also defines the behavior of multi-values Map (as it allows to get list of values for given key). Array would be simplest match of `Headers` and end users could build multi-values Map if they want.
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