E next();

  /**
   * {@inheritDoc}
   *
   * <p>Implementations may or may not support removal when a call to {@link #peek()} has occurred
   * since the most recent call to {@link #next()}.
   *
   * @throws IllegalStateException if there has been a call to {@link #peek()} since the most recent
   *     call to {@link #next()} and this implementation does not support this sequence of calls
   *     (optional)
   */
  @Override

        cl.delegate = builder
        cl.call()
        def firstChild = parent.getFirstChild()
        builder.elements.each { element ->
            parent.insertBefore(element, firstChild)
        }
    }

    public static void addBefore(Node sibling, Closure cl) {
        DomBuilder builder = new DomBuilder(sibling.ownerDocument, null)
        cl.delegate = builder
        cl.call()
        def parent = sibling.parentNode

When you want to call an `async def` function, you have to "await" it. So, this won't work:

```Python
# This won't work, because get_burgers was defined with: async def
burgers = get_burgers(2)
```

---

     * we must return it in the following next() call even if it was in the process of being removed
     * when hasNext() was called.
     */
    private @Nullable E nextItem;

    /**
     * Index of element returned by most recent call to next. Reset to -1 if this element is deleted
     * by a call to remove.
     */
    private int lastRet;

    Itr() {
      lastRet = -1;

and the matching call to <code>l.RUnlock</code> is synchronized before the return from call <i>n</i>+1 to <code>l.Lock</code>.
</p>

<p class="rule">
A successful call to <code>l.TryLock</code> (or <code>l.TryRLock</code>)
is equivalent to a call to <code>l.Lock</code> (or <code>l.RLock</code>).
An unsuccessful call has no synchronizing effect at all.
As far as the memory model is concerned,

	public fun requestBodyStart (Lokhttp3/Call;)V
	public fun requestFailed (Lokhttp3/Call;Ljava/io/IOException;)V
	public fun requestHeadersEnd (Lokhttp3/Call;Lokhttp3/Request;)V
	public fun requestHeadersStart (Lokhttp3/Call;)V
	public fun responseBodyEnd (Lokhttp3/Call;J)V
	public fun responseBodyStart (Lokhttp3/Call;)V
	public fun responseFailed (Lokhttp3/Call;Ljava/io/IOException;)V

	BEQ	R1, 2(PC)
	JAL	1(PC)		// CALL 1(PC)	// 0c00000f
	BEQ	R1, 2(PC)
	JAL	label0+0	// CALL 3	// 0c000007

//	LBRA addr
//	{
//		outcode(int($1), &nullgen, 0, &$2);
//	}
	BEQ	R1, 2(PC)
	JMP	0(R1)		// JMP (R1)	// 00200008
	BEQ	R1, 2(PC)
	JMP	foo+0(SB)	// JMP foo(SB)	// 08000019
	BEQ	R1, 2(PC)
	JAL	0(R1)		// CALL (R1)	// 0020f809
	BEQ	R1, 2(PC)
	JAL	foo+0(SB)	// CALL foo(SB)	// 0c000021

//
// BEQ/BNE

    long toWaitMillis = 3500 - NANOSECONDS.toMillis(System.nanoTime() - thread.startTime);
    Thread.sleep(toWaitMillis);
    thread.setPriority(Thread.MAX_PRIORITY);
    Thread.class.getMethod("resume").invoke(thread);
    thread.join();
    // It's possible to race and suspend the thread just before the park call actually takes effect,

        @Override
        public void call(Listener listener) {
          listener.starting();
        }

        @Override
        public String toString() {
          return "starting()";
        }
      };
  private static final ListenerCallQueue.Event<Listener> RUNNING_EVENT =
      new ListenerCallQueue.Event<Listener>() {
        @Override
        public void call(Listener listener) {
          listener.running();

  static final String MULTIPLE_EDGES_CONNECTING =
      "Cannot call edgeConnecting() when parallel edges exist between %s and %s. Consider calling "
          + "edgesConnecting() instead.";
  static final String PARALLEL_EDGES_NOT_ALLOWED =
      "Nodes %s and %s are already connected by a different edge. To construct a graph "
          + "that allows parallel edges, call allowsParallelEdges(true) on the Builder.";