docs: @Override
      public OptionalThing<LaJobNote> getJobNote() {
          final LaJobNote note = (jobTitle != null || jobDesc != null) ? LaJobNote.of(jobTitle, jobDesc) : null;
          return OptionalThing.ofNullable(note, () -> {
              throw new IllegalStateException("Not found the job note (both title and description).");
          });
      }