docs: public static Double checkLongitude(String name, Double longitude) {
          if (longitude == null) {
              throw new IndexException("{} required", name);
          } else if (longitude < MIN_LONGITUDE || longitude > MAX_LONGITUDE) {
              throw new IndexException("{} must be in range [{}, {}], but found {}",
                                       name,
                                       MIN_LONGITUDE,
                                       MAX_LONGITUDE,
                                       longitude);
          }
          return longitude;
      }