{"ast_node_type":"other","tokens":[{"end":238,"kind":"keyword","start":0,"text":"\"message\":"}]}
                        "message": "expected type `fn(&mut ty::list_iter::ListIterator<'list, M>) -> std::option::Option<&ty::Ref<M>>`\n   found type `fn(&ty::list_iter::ListIterator<'list, M>) -> std::option::Option<&'list ty::Ref<M>>`",
                    {
                        "code": null,