{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"bound_vars.insert(param.def_id,"}]}
                bound_vars.insert(param.def_id, arg);
                let arg = ResolvedArg::late(initial_bound_vars + late_bound_idx as u32, param);
                late_arg_as_bound_arg(param)