  title: str
    used_parameters: Dict[Any, Any]
    lookup_kwarg: str = ...
    lookup_kwarg_isnull: str = ...
    lookup_val: None = ...
    lookup_val_isnull: None = ...
    empty_value_display: str = ...
    lookup_choices: QuerySet = ...

class RelatedOnlyFieldListFilter(RelatedFieldListFilter):
    lookup_kwarg: str
    lookup_kwarg_isnull: str
    lookup_val: None
    lookup_val_isnull: None
    title: str
    used_parameters: Dict[Any, Any]
PK