Implement KIP-893 nullable entity fields #101
Merged
+309
−43
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This commit implements support for the nullable entity field introduced in
ConsumerGroupHeartbeatResponse.assignment
. This kind of field was formalized upstream in KIP-893 but is not mentioned in any official documentation of the protocol.The KIP also mentions tagged fields. I left this out as I don't understand why another mechanism for omiting a tagged field value is needed, and AFAIK no entity uses this yet.
Partially addresses #100.