code: private SpecialSection getOrThrow(
              Optional<? extends SpecialSection> optional, String message) {
          if (optional.isPresent()) {
              return optional.get();
          }
          throw new IllegalStateException(message);
      }
docs: Shortens the loadXSection() methods by handling an empty Optional with an
  IllegalStateException.
  
  @param optional
  @param message
  @return