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| 1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 /// A generator of globally unique identifiers. | |
| 6 class IdGenerator { | |
| 7 int _nextFreeId = 0; | |
| 8 | |
| 9 /// Returns the next free identifier. | |
| 10 /// | |
| 11 /// This identifier is guaranteed to be unique. | |
| 12 int getNextFreeId() => _nextFreeId++; | |
| 13 } | |
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