public void deschedule(Node<K, V> node) {
    unlink(node);
    node.setNextInVariableOrder(null);
    node.setPreviousInVariableOrder(null);
  }
@Test(dataProvider = "clock")
  public void deschedule_notScheduled(long clock) {
    timerWheel.nanos = clock;
    timerWheel.deschedule(new Timer(clock + 100));
  }