*/
    @Nonnull
    @Override
    public Optional<String> option() {
        return Optional.ofNullable(option);
    }

    /**
     * Returns the option followed by a string representation of the given path elements.
     * For example, if this type is {@link #MODULES}, then the option is {@code "--module-path"}
     * followed by the specified path elements.
     *

   */
  @Override
  public abstract int hashCode();

  /**
   * Returns a string representation for this instance.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this class leaves the specific string
   * representation unspecified, unlike the Java 8+ equivalent.
   */
  @Override
  public abstract String toString();

  /**

  @Override
  @GwtIncompatible // NavigableSet
  ImmutableSortedSet<C> createDescendingSet() {
    return new DescendingImmutableSortedSet<>(this);
  }

  /** Returns a shorthand representation of the contents such as {@code "[1..100]"}. */
  @Override
  public String toString() {
    return range().toString();
  }

  /**

     *
     * <p>After calling this method, you can keep adding more properties to later call toString()
     * again and get a more complete representation of the same object; but properties cannot be
     * removed, so this only allows limited reuse of the helper instance. The helper allows
     * duplication of properties (multiple name/value pairs with the same name can be added).

 * has not actually been put in the {@code BloomFilter}.
 *
 * <p>Bloom filters are serializable. They also support a more compact serial representation via the
 * {@link #writeTo} and {@link #readFrom} methods. Both serialized forms will continue to be
 * supported by future versions of this library. However, serial forms generated by newer versions

    }
    return hashCode;
  }

  /*
   * Serializes ImmutableLists as their logical contents. This ensures that
   * implementation types do not leak into the serialized representation.
   */
  @J2ktIncompatible // serialization
  static class SerializedForm implements Serializable {
    final Object[] elements;

    SerializedForm(Object[] elements) {
      this.elements = elements;

      @Override
      @ParametricNullness
      V getOutput(int entry) {
        return value(entry);
      }
    };
  }

  /**
   * Ensures that this {@code CompactHashMap} has the smallest representation in memory, given its
   * current size.
   */
  public void trimToSize() {
    if (needsAllocArrays()) {
      return;
    }
    Map<K, V> delegate = delegateOrNull();
    if (delegate != null) {

  public static <E extends @Nullable Object> FluentIterable<E> of(
      @ParametricNullness E element, E... elements) {
    return from(Lists.asList(element, elements));
  }

  /**
   * Returns a string representation of this fluent iterable, with the format {@code [e1, e2, ...,
   * en]}.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.collect(Collectors.joining(", ", "[", "]"))}

      if (collection1.size() != collection2.size()) {
        return false;
      }
    }
    return Iterators.elementsEqual(iterable1.iterator(), iterable2.iterator());
  }

  /**
   * Returns a string representation of {@code iterable}, with the format {@code [e1, e2, ..., en]}
   * (that is, identical to {@link java.util.Arrays Arrays}{@code
   * .toString(Iterables.toArray(iterable))}). Note that for <i>most</i> implementations of {@link

          LoggerHolder.logger.log(
              Level.WARNING, "ignoring weigher specified without maximumWeight");
        }
      }
    }
  }

  /**
   * Returns a string representation for this CacheBuilder instance. The exact form of the returned
   * string is not specified.
   */
  @Override
  public String toString() {
    MoreObjects.ToStringHelper s = MoreObjects.toStringHelper(this);