code: def append(self, error_message):
          
          self.problems = self.problems + error_message.problems
          self.details = self.details + error_message.details
          self.suggestions = self.suggestions + error_message.suggestions
          self.tracebacks.items.extend(error_message.tracebacks.items)
docs: Add an ErrorMessage to the end of the queue.
  
          Tracebacks are not appended.
  
          :param error_message: An element to add to the message.
          :type error_message: ErrorMessage