njs_promise_species(njs_vm_t *vm, njs_value_t *args, njs_uint_t nargs,
    njs_index_t unused)
{
    njs_vm_retval_set(vm, njs_argument(args, 0));

    return NJS_OK;
}
njs_promise_species(njs_vm_t *vm, njs_value_t *args, njs_uint_t nargs,
    njs_index_t unused)
{
    njs_vm_retval_set(vm, njs_argument(args, 0));

    return NJS_OK;
}