code: def receive_start_confirmation(self, message):
          
          if message.is_success():
              self._next(KnittingStarted)
          else:
              self._next(StartingFailed)
docs: Receive a StartConfirmation message.
  
          :param message: a :class:`StartConfirmation
            <AYABInterface.communication.hardware_messages.StartConfirmation>`
            message
  
          If the message indicates success, the communication object transitions
          into :class:`KnittingStarted` or else, into :class:`StartingFailed`.