*   <li>Each lock adds (and removes) itself to/from a ThreadLocal Set of acquired locks when the
 *       Thread acquires its first hold (and releases its last remaining hold).
 *   <li>Before the lock is acquired, the lock is checked against the current set of acquired
 *       locks---to each of the acquired locks, an edge from the soon-to-be-acquired lock is either
 *       verified or created.

        lock.lock();
        try {
          toReturn = initializeOrUpdateCancellationDelegate(schedule);
        } catch (Throwable e) {
          // Any Exception is either a RuntimeException or sneaky checked exception.
          //
          // If an exception is thrown by the subclass then we need to make sure that the service
          // notices and transitions to the FAILED state. We do it by calling notifyFailed directly

   * other collection type like {@link List}, but it may be unexpected to the user of a multiset.
   *
   * @param elements the collection of elements to be checked for containment in this multiset
   * @return {@code true} if this multiset contains at least one occurrence of each element
   *     contained in {@code elements}
   * @throws NullPointerException if {@code elements} is null

    cancelation.
 *  Fix: When a network interceptor mutates a request, that change is now
    reflected in `Response.networkResponse()`.
 *  Fix: Badly-behaving caches now throw a checked exception instead of a
    `NullPointerException`.
 *  Fix: Better handling of uncaught exceptions in MockWebServer with HTTP/2.

## Version 2.3.0

_2015-03-16_

    @Override
    public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {}
  }

  /**
   * A CyclicBarrier that uses timed await and fails with AssertionFailedErrors instead of throwing
   * checked exceptions.
   */
  public class CheckedBarrier extends CyclicBarrier {
    public CheckedBarrier(int parties) {
      super(parties);
    }

    @Override
    public int await() {

 *   <li>Each lock adds (and removes) itself to/from a ThreadLocal Set of acquired locks when the
 *       Thread acquires its first hold (and releases its last remaining hold).
 *   <li>Before the lock is acquired, the lock is checked against the current set of acquired
 *       locks---to each of the acquired locks, an edge from the soon-to-be-acquired lock is either
 *       verified or created.

oveClass(CLASS_NAME_ACTIVE)\n            }\n          }\n        }\n\n        if (triggerChangeEvent) {\n          // if it's not a radio button or checkbox don't add a pointless/invalid checked property to the input\n          if (input.type === 'checkbox' || input.type === 'radio') {\n            input.checked = !this._element.classList.contains(CLASS_NAME_ACTIVE)\n          }\n\n          if (!this.shouldAvoidTriggerChange) {\n            $(input).trigger('change')\n          }\n        }\n\n...

    // * Everything with (index < to) should be kept.
    // * Everything with (to <= index < from) should be removed.
    // * The element with (index == from) should be kept.
    // * Everything with (index > from) has not been checked yet.

    // Check from the end of the list backwards (minimize expected cost of
    // moving elements when remove() is called). Stop before 'from' because
    // we already know that should be kept.

focus~.custom-control-label::before,.was-validated .custom-control-input:valid:focus~.custom-control-label::before{box-shadow:0 0 0 .2rem rgba(40,167,69,.25)}.custom-control-input.is-valid:focus:not(:checked)~.custom-control-label::before,.was-validated .custom-control-input:valid:focus:not(:checked)~.custom-control-label::before{border-color:#28a745}.custom-file-input.is-valid~.custom-file-label,.was-validated .custom-file-input:valid~.custom-file-label{border-color:#28a745}.custom-file-input.i...

	g()
}
</pre>

<p>
it can happen that <code>g</code> prints <code>2</code> and then <code>0</code>.
</p>

<p>
This fact invalidates a few common idioms.
</p>

<p>
Double-checked locking is an attempt to avoid the overhead of synchronization.
For example, the <code>twoprint</code> program might be
incorrectly written as:
</p>

<pre>
var a string
var done bool

func setup() {