{"ast_node_type":"variable","tokens":[{"end":96,"kind":"keyword","start":0,"text":"let"}]}
                        let kind = TyKind::Tup(act_ret.iter().map(|arg| arg.clone()).collect());
                    } else {
                        P(rustc_ast::Ty { kind, id: ast::DUMMY_NODE_ID, span, tokens: None })