The same as PolymorphicParentModelAdmin.get_child_models() allows to dynamically get the child models with base_model.__subclasses__(), I would like to have PolymorphicInlineModelAdmin.get_child_inlines() method that I can overwrite to get the inlines subclasses, and don't need to set them explicitly. This would allows me to have a cleaner code, and also prevent some circular references.