{"ast_node_type":"variable","tokens":[{"end":86,"kind":"keyword","start":0,"text":"let"}]}
                    let param_type = tcx.type_of(param.def_id).instantiate_identity();
                    let param_name = tcx.hir_ty_param_name(param_local_id);
                    if param_type.is_suggestable(tcx, false) {