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public static MembershipChangeResult enableStaticMembership(String groupId, int registrationTimeout, int expansionTimeout)
public static MembershipChangeResult enableDynamicMembership(String groupId)
public static MembershipChangeResult forceRebalance(String groupId)

where enableStaticMembership will change the consumer group to static membership, along with changing registration timeout and expansion timeout. After that, all the joining members are required to set the member name field. Error will be returned if the broker is on an old version or other potential failure cases. Note that the client should already include member name field at this point. User could also use this API to change the timeout configs as they want, or leave it blank for the first time when they start to try the new membership protocol.

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