docs: def _to_dict(self):
          """Return a json dictionary representing this model."""
          _dict = {}
          if hasattr(self, 'intent') and self.intent is not None:
              _dict['intent'] = self.intent
          if hasattr(self, 'description') and self.description is not None:
              _dict['description'] = self.description
          if hasattr(self, 'created') and self.created is not None:
              _dict['created'] = datetime_to_string(self.created)
          if hasattr(self, 'updated') and self.updated is not None:
              _dict['updated'] = datetime_to_string(self.updated)
          if hasattr(self, 'examples') and self.examples is not None:
              _dict['examples'] = [x._to_dict() for x in self.examples]
          return _dict