code: @SafeVarargs
    public static <T> Ordering<T> explicitOrderingUnrankedLast(T leastRankedValue,
        T... remainingValuesInOrder) {
      return explicitOrderingUnrankedLast(
          Lists.asList(leastRankedValue, remainingValuesInOrder));
    }
docs: Like {@link Ordering#explicit(Object, Object[])} but does not throw an exception when comparing
  items not explicitly ranked.  Instead, two items not explicitly ranked are considered
  equal.  Any explicitly ranked item comes before than any non-explicitly ranked item
  in the ordering.