pkg/front_end/testcases/patterns/switchExpression_onePattern_trailingComma.dart

// Copyright (c) 2022, 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.

f(x) => switch (x) {
  _ => 0,
};