{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"Ty::new_param(tcx,"}]}
                Ty::new_param(tcx, index, tcx.hir_ty_param_name(def_id))
                let index = generics.param_def_id_to_index[&def_id.to_def_id()];
            }