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Similarly, for BrokerRegistrationRequest, we will create a new version 4. Servers which accept v4 promise to be able to handle ranges including 0. Servers which do not will get ranges that only start with 1, rather than 0.

Finally, if the maximum supported version is 0, the feature is simply not exposed as supported at all via the ApiVersionsResponse or the BrokerRegistrationRequest. Likewise, if a finalized feature is 0, it is not returned in the ApiVersionsResponse.

Compatibility, Deprecation, and Migration Plan

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