lib/src/internal.dart

// Copyright (c) 2016, 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.

List/*<E>*/ freezeInDevMode/*<E>*/(List/*<E>*/ list) {
  if (list == null) return const [];
  assert(() {
    list = new List/*<E>*/ .unmodifiable(list);
    return true;
  });
  return list;
}