{"ast_node_type":"variable","tokens":[{"end":88,"kind":"keyword","start":0,"text":"let"}]}
                let infer_args = self.tcx.mk_args_from_iter(args.into_iter().map(|arg| {
                // them with underscores to allow the compiler to infer them
                    if !arg.is_suggestable(self.tcx, true) {