{"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"let"}]}
            let mut names = format!("`{}`", self.tcx.def_path_str(traits[0]));
                MultiSpan::from_spans(traits.iter().map(|&did| self.tcx.def_span(did)).collect());
            for (i, &did) in traits.iter().enumerate().skip(1) {