code: def _to_dict(self):
          
          _dict = {}
          if hasattr(self, 'confidence') and self.confidence is not None:
              _dict['confidence'] = self.confidence
          if hasattr(self, 'class_name') and self.class_name is not None:
              _dict['class_name'] = self.class_name
          return _dict
docs: Return a json dictionary representing this model.