docs: @Override
      public void deliver(VoltMessage message)
      {
          if (message instanceof Iv2RepairLogResponseMessage) {
              Iv2RepairLogResponseMessage response = (Iv2RepairLogResponseMessage)message;
              if (response.getRequestId() != m_requestId) {
                  if (repairLogger.isTraceEnabled()) {
                      repairLogger.trace(m_whoami + "rejecting stale repair response."
                              + " Current request id is: " + m_requestId
                              + " Received response for request id: " + response.getRequestId());
                  }
                  return;
              }
  
              // Step 1: if the msg has a known (not MAX VALUE) handle, update m_maxSeen.
              if (response.getTxnId() != Long.MAX_VALUE) {
                  m_maxSeenTxnId = Math.max(m_maxSeenTxnId, response.getTxnId());
              }
  
              // Step 2: track hashinator versions
  
              if (response.hasHashinatorConfig()) {
                  Pair<Long,byte[]> proposed = response.getHashinatorVersionedConfig();
                  if (proposed.getFirst() > m_newestHashinatorConfig.getFirst()) {
                      m_newestHashinatorConfig = proposed;
                  }
              }
  
              // Step 3: offer to the union
              addToRepairLog(response);
              if (repairLogger.isDebugEnabled()) {
                  repairLogger.debug(m_whoami + " collected from " + CoreUtils.hsIdToString(response.m_sourceHSId) +
                          ", message: " + response.getPayload());
              }
  
              // Step 4: update the corresponding replica repair struct.
              ReplicaRepairStruct rrs = m_replicaRepairStructs.get(response.m_sourceHSId);
              if (rrs.m_expectedResponses < 0) {
                  if (repairLogger.isDebugEnabled()) {
                      repairLogger.debug(m_whoami + "collecting " + response.getOfTotal()
                      + " repair log entries from "
                      + CoreUtils.hsIdToString(response.m_sourceHSId));
                  }
              }
  
              if (rrs.update(response)) {
                  if (repairLogger.isDebugEnabled()) {
                      repairLogger.debug(m_whoami + "collected " + rrs.m_receivedResponses
                              + " responses for " + rrs.m_expectedResponses
                              + " repair log entries from " + CoreUtils.hsIdToString(response.m_sourceHSId));
                  }
  
                  if (areRepairLogsComplete()) {
  
                      TheHashinator.updateHashinator(ElasticHashinator.class,
                              m_newestHashinatorConfig.getFirst(), m_newestHashinatorConfig.getSecond(), true);
  
                      //no real transaction repair when triggered with MigratePartitionLeader. Theoretically it should not be here.
                      //MigratePartitionLeader should not trigger MP promotion.
                      if (m_isMigratePartitionLeader) {
                          m_promotionResult.set(new RepairResult(m_maxSeenTxnId));
                      } else {
                          repairSurvivors();
                      }
                  }
              }
          }
      }