code: def add_to(self, parent, **kwargs):
          # type: (Part, **Any) -> Part
          
          if self.category != Category.MODEL:
              raise APIError("Part should be of category MODEL")
  
          return self._client.create_part(parent, self, **kwargs)
docs: Add a new instance of this model to a part.
  
          This works if the current part is a model and an instance of this model is to be added
          to a part instances in the tree.
  
          In order to prevent the backend from updating the frontend you may add `suppress_kevents=True` as
          additional keyword=value argument to this method. This will improve performance of the backend
          against a trade-off that someone looking at the frontend won't notice any changes unless the page
          is refreshed.
  
          :param parent: part to add the new instance to
          :param kwargs: (optional) additional kwargs that will be passed in the during the edit/update request
          :type kwargs: dict or None
          :type parent: :class:`Part`
          :param kwargs: (optional) additional keyword=value arguments
          :type kwargs: dict
          :return: :class:`Part` with category `INSTANCE`
          :raises APIError: if unable to add the new child instance
  
          Example
          -------
  
          >>> wheel_model = project.model('wheel')
          >>> bike = project.part('Bike')
          >>> wheel_model.add_to(bike)