code: public boolean isStartedBy(final T element) {
          if (element == null) {
              return false;
          }
  
          return lowerEndpoint.isClosed && lowerEndpoint.compareTo(element) == 0;
      }
docs: <p>
  Checks whether this range starts with the specified element.
  </p>
  
  @param element
  the element to check for, null returns false
  @return true if the specified element occurs within this range