}
  }

  /**
   * Attempts to remove a single frame from a queue and send it. This prefers to write urgent pongs
   * before less urgent messages and close frames. For example, it's possible that a caller will
   * enqueue messages followed by pongs, but this sends pongs followed by messages. Pongs are always
   * written in the order they were enqueued.
   *

   *         .put(BarHandler.class, new SubBarHandler())
   *         .put(Handler.class, new QuuxHandler())
   *         .build();
   * }
   *
   * <p>After invoking {@link #build()} it is still possible to add more entries and build again.
   * Thus each map generated by this builder will be a superset of any map generated before it.
   *
   * @since 2.0
   */
  public static final class Builder<B> {

import com.google.common.escape.Escaper;
import com.google.common.escape.Escapers;

/**
 * {@code Escaper} instances suitable for strings to be included in XML attribute values and
 * elements' text contents. When possible, avoid manual escaping by using templating systems and
 * high-level APIs that provide autoescaping. For example, consider <a
 * href="http://www.xom.nu/">XOM</a>.
 *

  }

  public void testImmutableSortedMultiset() {
    doHasAllFauxveridesTest(ImmutableSortedMultiset.class, ImmutableMultiset.class);
  }

  /*
   * Demonstrate that ClassCastException is possible when calling
   * ImmutableSorted{Set,Map}.copyOf(), whose type parameters we are unable to
   * restrict (see ImmutableSortedSetFauxverideShim).
   */

  public void testImmutableSortedMapCopyOfMap() {

    if (monitor.enterWhenUninterruptibly(hasReachedRunning, timeout, unit)) {
      try {
        checkCurrentState(RUNNING);
      } finally {
        monitor.leave();
      }
    } else {
      // It is possible due to races that we are currently in the expected state even though we
      // timed out. e.g. if we weren't event able to grab the lock within the timeout we would never

  public static <E extends @Nullable Object> ArrayList<E> newArrayList(
      Iterable<? extends E> elements) {
    checkNotNull(elements); // for GWT
    // Let ArrayList's sizing logic work, if possible
    return (elements instanceof Collection)
        ? new ArrayList<>((Collection<? extends E>) elements)
        : newArrayList(elements.iterator());
  }

  /**

    "ThreadPriorityCheck", // TODO: b/175898629 - Consider onSpinWait.
  })
  private void waitForInterrupt(Thread currentThread) {
    /*
     * If someone called cancel(true), it is possible that the interrupted bit hasn't been set yet.
     * Wait for the interrupting thread to set DONE. (See interruptTask().) We want to wait so that
     * the interrupting thread doesn't interrupt the _next_ thing to run on this thread.

 *
 * <p>Occasionally, an API will return a plain {@code Future} and it will be impossible to change
 * the return type. For this case, we provide a more expensive workaround in {@code
 * JdkFutureAdapters}. However, when possible, it is more efficient and reliable to create a {@code
 * ListenableFuture} directly.
 *
 * @author Sven Mawson
 * @author Nishant Thakkar
 * @since 1.0
 */
/*

    return this;
  }

  /**
   * Returns a new thread factory using the options supplied during the building process. After
   * building, it is still possible to change the options used to build the ThreadFactory and/or
   * build again. State is not shared amongst built instances.
   *
   * <p><b>Java 21+ users:</b> use {@link Thread.Builder#factory()} instead.
   *

You can also use `File()` with `UploadFile`, for example, to set additional metadata:

{* ../../docs_src/request_files/tutorial001_03_an_py39.py hl[9,15] *}

## Multiple File Uploads { #multiple-file-uploads }

It's possible to upload several files at the same time.

They would be associated to the same "form field" sent using "form data".

To use that, declare a list of `bytes` or `UploadFile`: