docs: def remote_complete(self, failure=None):
          """
          Called by the worker's
          L{buildbot_worker.base.WorkerForBuilderBase.commandComplete} to
          notify me the remote command has finished.
  
          @type  failure: L{twisted.python.failure.Failure} or None
  
          @rtype: None
          """
          self.worker.messageReceivedFromWorker()
          # call the real remoteComplete a moment later, but first return an
          # acknowledgement so the worker can retire the completion message.
          if self.active:
              eventually(self._finished, failure)
          return None