ReadonlyassignAssign partitions to members.
Subscriptions for all group members.
Known partition counts per topic. May be empty if partition counts are not yet discovered.
Assignment for each member.
ReadonlynameProtocol name sent in JoinGroup metadata (e.g. "range", "roundrobin", "cooperative-sticky").
Partition assignor strategy.
Receives all member subscriptions and known partition counts, and produces a partition assignment for each member.