code: def SetField(cls, default=NOTHING, required=True, repr=False, key=None):
      
      default = _init_fields.init_default(required, default, set())
      converter = converters.to_set_field(cls)
      validator = _init_fields.init_validator(required, types.TypedSet)
      return attrib(default=default, converter=converter, validator=validator,
                    repr=repr, metadata=dict(key=key))
docs: Create new set field on a model.
  
      :param cls: class (or name) of the model to be related in Set.
      :param default: any TypedSet or set
      :param bool required: whether or not the object is invalid if not provided.
      :param bool repr: include this field should appear in object's repr.
      :param bool cmp: include this field in generated comparison.
      :param string key: override name of the value when converted to dict.