{"ast_node_type":"variable","tokens":[{"end":90,"kind":"keyword","start":0,"text":"let"}]}
        let float_fallback = TyKind::Scalar(Scalar::Float(FloatTy::F64)).intern(Interner);
        let int_fallback = TyKind::Scalar(Scalar::Int(IntTy::I32)).intern(Interner);