{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"unit:"}]}
            unit: TyKind::Tuple(0, Substitution::empty(Interner)).intern(Interner),
            bool_: TyKind::Scalar(Scalar::Bool).intern(Interner),
            never: TyKind::Never.intern(Interner),