{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":".push_span_label(tcx.def_span(tcx.parent(trait_m.def_id)),"}]}
                    .push_span_label(tcx.def_span(tcx.parent(trait_m.def_id)), "in this trait...");
                multispan
                multispan.push_span_label(