code: def post_message(self, level, message, count=1, timestamp=None, now_reference=None):
          
  
          if len(self.messages) > 0 and self.messages[-1].message == message:
              self.messages[-1].count += 1
          else:
              msg_object = ServiceMessage(level, message, self._last_message_id, timestamp, now_reference)
              msg_object.count = count
              self.messages.append(msg_object)
              self._last_message_id += 1
  
          return self.messages[-1]
docs: Post a new message for service.
  
          Args:
              level (int): The level of the message (info, warning, error)
              message (string): The message contents
              count (int): The number of times the message has been repeated
              timestamp (float): An optional monotonic value in seconds for when the message was created
              now_reference (float): If timestamp is not relative to monotonic() as called from this
                  module then this should be now() as seen by whoever created the timestamp.
  
          Returns:
              ServiceMessage: The posted message