{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"bool_:"}]}
            bool_: TyKind::Scalar(Scalar::Bool).intern(Interner),
            unknown: TyKind::Error.intern(Interner),
            unit: TyKind::Tuple(0, Substitution::empty(Interner)).intern(Interner),