{"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"Closure(ref"}]}
                    Closure(ref closure)
                    MethodCall(ref call) => (&call.args[..], UnusedDelimsCtx::MethodArg),
                        if matches!(closure.fn_decl.output, FnRetTy::Default(_)) =>