@Override
        public String toStringBase() {
            return super.toStringBase() +
                    ", requestedPartitions=" + requestedPartitions;
        }
Handle OffsetFetch response that has no group level errors. This will look for
partition level errors and fail the future accordingly, also recording a failed request
attempt. If no partition level errors are found, this will complete the future with the
offsets contained in the response, and record a successful request attempt.
clients/src/main/java/org/apache/kafka/clients/consumer/internals/CommitRequestManager.java