code: def to_dict(self):
          
  
          input_dict = super(Prod, self)._save_to_input_dict()
          input_dict["class"] = str("GPy.kern.Prod")
          return input_dict
docs: Convert the object into a json serializable dictionary.
  
          Note: It uses the private method _save_to_input_dict of the parent.
  
          :return dict: json serializable dictionary containing the needed information to instantiate the object