code: def remote_update(self, updates):
          
          updates = decode(updates)
          self.worker.messageReceivedFromWorker()
          max_updatenum = 0
          for (update, num) in updates:
              # log.msg("update[%d]:" % num)
              try:
                  if self.active and not self.ignore_updates:
                      self.remoteUpdate(update)
              except Exception:
                  # log failure, terminate build, let worker retire the update
                  self._finished(Failure())
                  # TODO: what if multiple updates arrive? should
                  # skip the rest but ack them all
              if num > max_updatenum:
                  max_updatenum = num
          return max_updatenum
docs: I am called by the worker's
          L{buildbot_worker.base.WorkerForBuilderBase.sendUpdate} so
          I can receive updates from the running remote command.
  
          @type  updates: list of [object, int]
          @param updates: list of updates from the remote command