docs: private static DateTimeFormatter createDateTimeFormatter(int dateStyle, int timeStyle){
          int type = DATETIME;
          if (dateStyle == NONE) {
              type = TIME;
          } else if (timeStyle == NONE) {
              type = DATE;
          }
          StyleFormatter llf = new StyleFormatter(dateStyle, timeStyle, type);
          return new DateTimeFormatter(llf, llf);
      }