code: public static <T extends Comparable<T>> Range<T> just(final T element) {
          return closed(element, element);
      }
docs: <p>
  Obtains a range using the specified element as both the minimum and maximum in this range.
  </p>
  
  <p>
  The range uses the natural ordering of the elements to determine where values lie in the range.
  </p>
  
  @param <T>
  the type of the elements in this range
  @param element
  the value to use for this range, not null
  @return the range object, not null
  @throws IllegalArgumentException if the element is null