pkg/front_end/testcases/general/if_null_in_set_literal.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// @dart=2.9
main() {
  Object a, b;
  return {a ?? b};
}