.DataClass = 'dataclass': ClassType
.DataClass.
    __call__: (
        init := Bool,
        repr := Bool,
        eq := Bool,
        order := Bool,
        unsafe_hash := Bool,
        frozen := Bool,
        match_args := Bool,
        kw_only := Bool,
        slots := Bool,
        weakref_slots := Bool
    ) -> (ClassType -> ClassType)

.is_dataclass: (obj: Obj) -> Bool

._MISSING_TYPE: ClassType
.MISSING: ._MISSING_TYPE

._KW_ONLY_TYPE: ClassType
.KW_ONLY: _KW_ONLY_TYPE

.field: (default := ._MISSING_TYPE, default_factory := ._MISSING_TYPE, init := Bool, repr := Bool, hash := Bool, compare := Bool, metadata := GenericDict, kw_only := ._MISSING_TYPE) -> (Obj -> Obj)

.Field: ClassType