public TargetAssignmentBuilder<T> withStaticMembers(
        Map<String, String> staticMembers
    ) {
        this.staticMembers = staticMembers;
        return this;
    }
Adds all the existing static members.

@param staticMembers   The existing static members in the consumer group.
@return This object.
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/modern/TargetAssignmentBuilder.java