}
      };
    }

    /** Uses a hash-based {@code Set} to store value collections. */
    public SetMultimapBuilder<K0, @Nullable Object> hashSetValues() {
      return hashSetValues(DEFAULT_EXPECTED_VALUES_PER_KEY);
    }

    /**
     * Uses a hash-based {@code Set} to store value collections, initialized to expect the specified
     * number of values per key.
     *