{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"d_decl.output"}]}
                    d_decl.output = FnRetTy::Ty(ty.clone());
                    let ty = P(rustc_ast::Ty { kind, id: ast::DUMMY_NODE_ID, span, tokens: None });
                    assert!(matches!(x.ret_activity, DiffActivity::None));