code: private static void checkForOtherVariants(Data data, ULocale locale, String style) {
          DecimalFormat.Unit[] otherByBase = data.units.get(OTHER);
  
          if (otherByBase == null) {
              throw new IllegalArgumentException("No 'other' plural variants defined in "
                      + localeAndStyle(locale, style));
          }
  
          // Check all other plural variants, and make sure that if any of them are populated, then
          // other is also populated
          for (Map.Entry<String, Unit[]> entry : data.units.entrySet()) {
              if (entry.getKey() == OTHER) continue;
              DecimalFormat.Unit[] variantByBase = entry.getValue();
              for (int log10Value = 0; log10Value < MAX_DIGITS; log10Value++) {
                  if (variantByBase[log10Value] != null && otherByBase[log10Value] == null) {
                      throw new IllegalArgumentException(
                              "No 'other' plural variant defined for 10^" + log10Value
                              + " but a '" + entry.getKey() + "' variant is defined"
                              + " in " +localeAndStyle(locale, style));
                  }
              }
          }
      }
docs: Checks to make sure that an "other" variant is present in all powers of 10.
  @param data