*
     * 1) An interface I extending Comparable<I> so that the created array is of
     * an interface type. 2) An instance of a class implementing that interface
     * so that we can pass non-null instances of the interface.
     *
     * (Currently it's safe to pass instances for which compareTo() always
     * returns 0, but if we had a SingletonImmutableSortedSet, this might no
     * longer be the case.)
     *

 * is an immutable <i>supplier</i> of {@code OutputStream} instances.
 *
 * <p>{@code ByteSink} provides two kinds of methods:
 *
 * <ul>
 *   <li><b>Methods that return a stream:</b> These methods should return a <i>new</i>, independent
 *       instance each time they are called. The caller is responsible for ensuring that the
 *       returned stream is closed.

 * is an immutable <i>supplier</i> of {@code OutputStream} instances.
 *
 * <p>{@code ByteSink} provides two kinds of methods:
 *
 * <ul>
 *   <li><b>Methods that return a stream:</b> These methods should return a <i>new</i>, independent
 *       instance each time they are called. The caller is responsible for ensuring that the
 *       returned stream is closed.

     */
    @Nonnull
    static ProjectBuilderRequestBuilder builder() {
        return new ProjectBuilderRequestBuilder();
    }

    /**
     * Builder for creating ProjectBuilderRequest instances.
     * This builder provides a fluent API for setting the various properties of a request.
     */
    @NotThreadSafe
    class ProjectBuilderRequestBuilder {
        Session session;
        RequestTrace trace;

  }

  private static final class EmptySetBuilderImpl<E> extends SetBuilderImpl<E> {
    private static final EmptySetBuilderImpl<Object> INSTANCE = new EmptySetBuilderImpl<>();

    @SuppressWarnings("unchecked")
    static <E> SetBuilderImpl<E> instance() {
      return (SetBuilderImpl<E>) INSTANCE;
    }

    private EmptySetBuilderImpl() {
      super(0);
    }

    @Override
    SetBuilderImpl<E> add(E e) {

   * short[])}.
   *
   * @since 2.0
   */
  public static Comparator<short[]> lexicographicalComparator() {
    return LexicographicalComparator.INSTANCE;
  }

  private enum LexicographicalComparator implements Comparator<short[]> {
    INSTANCE;

    @Override
    public int compare(short[] left, short[] right) {
      int minLength = Math.min(left.length, right.length);

   * short[])}.
   *
   * @since 2.0
   */
  public static Comparator<short[]> lexicographicalComparator() {
    return LexicographicalComparator.INSTANCE;
  }

  private enum LexicographicalComparator implements Comparator<short[]> {
    INSTANCE;

    @Override
    public int compare(short[] left, short[] right) {
      int minLength = Math.min(left.length, right.length);

            return null;
        }
        if (src.getClass() == Date.class) {
            return (Date) src;
        }
        if (src instanceof Date) {
            return new Date(((Date) src).getTime());
        }
        if (src instanceof Calendar) {
            return new Date(((Calendar) src).getTimeInMillis());
        }
        final String str = src.toString();
        if (isEmpty(str)) {

     */
    public DefaultQueryBuilder(final QueryBuilder queryBuilder) {
        this.queryBuilder = queryBuilder;
        if (queryBuilder instanceof BoolQueryBuilder) {
            queryType = QueryType.BOOL;
        } else if (queryBuilder instanceof DisMaxQueryBuilder) {
            queryType = QueryType.DISMAX;
        } else {
            throw new IllegalArgumentException("Unknown query builder: " + queryBuilder);

  public static <V extends @Nullable Object> ListenableFuture<V> immediateCancelledFuture() {
    ListenableFuture<Object> instance = ImmediateCancelledFuture.INSTANCE;
    if (instance != null) {
      return (ListenableFuture<V>) instance;
    }
    return new ImmediateCancelledFuture<>();
  }

  /**