* that entries are indexable using ints.
   */
  static final int MAXIMUM_CAPACITY = Ints.MAX_POWER_OF_TWO;

  /** The maximum number of segments to allow; used to bound constructor arguments. */
  static final int MAX_SEGMENTS = 1 << 16; // slightly conservative

  /** Number of (unsynchronized) retries in the containsValue method. */
  static final int CONTAINS_VALUE_RETRIES = 3;

    boolean isSubtypeOf(Type supertype) {
      for (Type bound : bounds) {
        if (of(bound).isSubtypeOf(supertype) == target) {
          return target;
        }
      }
      return !target;
    }

    boolean isSupertypeOf(Type subtype) {
      TypeToken<?> type = of(subtype);
      for (Type bound : bounds) {
        if (type.isSubtypeOf(bound) == target) {
          return target;
        }

  public static <V extends @Nullable Object> ListenableFuture<List<@Nullable V>> successfulAsList(
      ListenableFuture<? extends V>... futures) {
    /*
     * Another way to express this signature would be to bound <V> by @NonNull and accept
     * LF<? extends @Nullable V>. That might be better: There's currently no difference between the
     * outputs users get when calling this with <Foo> and calling it with <@Nullable Foo>. The only