@Override
        public boolean equals(Object o) {
            return o instanceof MemberInfo && this.memberId.equals(((MemberInfo) o).memberId);
        }
Default implementation of assignPartitions() that does not include racks. This is only
included to avoid breaking any custom implementation that extends AbstractPartitionAssignor.
Note that this class is internal, but to be safe, we are maintaining compatibility.
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AbstractPartitionAssignor.java