/** see {@link WorkerRunningState} */
  @LazyInit
  @GuardedBy("queue")
  private WorkerRunningState workerRunningState = IDLE;

  /**
   * This counter prevents an ABA issue where a thread may successfully schedule the worker, the
   * worker runs and exhausts the queue, another thread enqueues a task and fails to schedule the

                    return new SampleElements<>(
                        mapEntry("a", 1),
                        mapEntry("aa", 2),
                        mapEntry("aba", 3),
                        mapEntry("bbbb", 4),
                        mapEntry("ccccc", 5));
                  }

                  @Override

                    return new SampleElements<>(
                        mapEntry("a", 1),
                        mapEntry("aa", 2),
                        mapEntry("aba", 3),
                        mapEntry("bbbb", 4),
                        mapEntry("ccccc", 5));
                  }

                  @Override

Hereñú, David Eng, David Norman, David Y. Zhang, Davy Song, ddurham2, Deepak
Subburam, Dmytro Kyrychuk, Dominic Rossi, Dominik SchlöSser, Dustin Tran,
Eduardo Pinho, Egil Martinsson, Elliot Saba, Eric Bigelow, Erik Smistad, Evan
Klitzke, Fabrizio Milo, Falcon Dai, Fei Gao, FloopCZ, Fung Lam, Gautam,
GBLin5566, Greg Peatfield, Gu Wang, Guenther Schmuelling, Hans Pabst, Harun

0AB4          ; disallowed                             # NA   <reserved-0AB4>
0AB5..0AB9    ; valid                                  # 1.1  GUJARATI LETTER VA..GUJARATI LETTER HA
0ABA..0ABB    ; disallowed                             # NA   <reserved-0ABA>..<reserved-0ABB>
0ABC..0AC5    ; valid                                  # 1.1  GUJARATI SIGN NUKTA..GUJARATI VOWEL SIGN CANDRA E

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