code: def kwargs(self):
      
      return {k: v for k, v in self._kwargs.items() if k not in self._INTERNAL_FIELDS}
docs: Returns a dict of the kwargs for this Struct which were not interpreted by the baseclass.
  
      This excludes fields like `extends`, `merges`, and `abstract`, which are consumed by
      SerializableFactory.create and Validatable.validate.