Entry<K, V>... entries) {
    return fromEntries(Ordering.natural(), false, entries, entries.length);
  }

  /**
   * Accepts a collection of possibly-null entries. If {@code sameComparator}, then it is assumed
   * that they do not need to be sorted or checked for dupes.
   */
  private static <K, V> ImmutableSortedMap<K, V> fromEntries(
      Comparator<? super K> comparator,
      boolean sameComparator,