Method downTo

guava/src/com/google/common/collect/Range.java:263–271

Returns a range from the given endpoint, which may be either inclusive (closed) or exclusive (open), with no upper bound. @since 14.0

(C endpoint, BoundType boundType)

   * @since 14.0
   */
  public static <C extends Comparable<?>> Range<C> downTo(C endpoint, BoundType boundType) {
    switch (boundType) {
      case OPEN:
        return greaterThan(endpoint);
      case CLOSED:
        return atLeast(endpoint);
    }
    throw new AssertionError();
  }

  private static final Range<Comparable> ALL = new Range<>(Cut.belowAll(), Cut.aboveAll());