@Override
  @DoNotCall("Always throws UnsupportedOperationException")
  @CheckForNull
  public final E pollFirst() {
    throw new UnsupportedOperationException();
  }

  /**
   * Guaranteed to throw an exception and leave the set unmodified.
   *
   * @since 12.0
   * @throws UnsupportedOperationException always
   * @deprecated Unsupported operation.
   */
  @CanIgnoreReturnValue

        new AbstractLoadingCache<Object, Object>() {
          @Override
          public Object get(Object key) throws ExecutionException {
            Object v = valueRef.get();
            if (v == null) {
              throw new ExecutionException(cause);
            }
            return v;
          }

          @Override
          public @Nullable Object getIfPresent(Object key) {
            return valueRef.get();
          }

   * {@code view} returned by this method will be invalidated, and will throw {@code
   * IllegalStateException} if it is accessed in any way, with the following exceptions:
   *
   * <ul>
   *   <li>{@code view.equals(view)} evaluates to {@code true} (but any other {@code equals()}
   *       expression involving {@code view} will throw)
   *   <li>{@code hashCode()} does not throw

   * {@code view} returned by this method will be invalidated, and will throw {@code
   * IllegalStateException} if it is accessed in any way, with the following exceptions:
   *
   * <ul>
   *   <li>{@code view.equals(view)} evaluates to {@code true} (but any other {@code equals()}
   *       expression involving {@code view} will throw)
   *   <li>{@code hashCode()} does not throw

        newInstanceWithExplicitOrdering(MyOrder.class, Policies.THROW);
    lock1 = factory2.newReentrantLock(MyOrder.FIRST);
    lock2 = factory2.newReentrantLock(MyOrder.SECOND);
    lock3 = factory2.newReentrantLock(MyOrder.THIRD);

    CycleDetectingLockFactory.WithExplicitOrdering<OtherOrder> factory3 =
        newInstanceWithExplicitOrdering(OtherOrder.class, Policies.THROW);
    lock01 = factory3.newReentrantLock(OtherOrder.FIRST);

        newInstanceWithExplicitOrdering(MyOrder.class, Policies.THROW);
    lock1 = factory2.newReentrantLock(MyOrder.FIRST);
    lock2 = factory2.newReentrantLock(MyOrder.SECOND);
    lock3 = factory2.newReentrantLock(MyOrder.THIRD);

    CycleDetectingLockFactory.WithExplicitOrdering<OtherOrder> factory3 =
        newInstanceWithExplicitOrdering(OtherOrder.class, Policies.THROW);
    lock01 = factory3.newReentrantLock(OtherOrder.FIRST);

            invokerRequest.options().displayHelp(context.invokerRequest.parserRequest(), writer);
            throw new ExitException(0);
        }
        if (invokerRequest.options().showVersionAndExit().isPresent()) {
            showVersion(context);
            throw new ExitException(0);
        }
    }

    protected void showVersion(C context) {

   * @throws IllegalArgumentException {@inheritDoc}
   */
  @CanIgnoreReturnValue
  @Override
  public int drainTo(Collection<? super E> c) {
    if (c == null) throw new NullPointerException();
    if (c == this) throw new IllegalArgumentException();
    final E[] items = this.items;
    final Monitor monitor = this.monitor;
    monitor.enter();
    try {
      int i = takeIndex;
      int n = 0;

                if ( ( ch & 0xC0 ) != 0x80 ) {
                    throw new IOException("Invalid UTF-8 sequence");
                }
                uni[ ui ] |= ( ch & 0x3F ) << 6;
                ch = src[ si++ ] & 0xFF;
                uni[ ui ] |= ch & 0x3F;
                if ( ( ch & 0xC0 ) != 0x80 || uni[ ui ] < 0x800 ) {
                    throw new IOException("Invalid UTF-8 sequence");
                }
            }

            return created;
        } catch (final Exception e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Failed to create index. index: {}", index, e);
            }
            throw new SuggesterException("Failed to create index.", e);
        }
    }

    public void createNextIndex() {
        try {
            final List<String> prevIndices = new ArrayList<>();