docs: @CheckForNull
      public static Number tryParseNumber(@CheckForNull String numberStr, @CheckForNull Number defaultNumber) {
          if ((numberStr == null) || (numberStr.length() == 0)) {
              return defaultNumber;
          }
          try {
              return NumberFormat.getNumberInstance().parse(numberStr);
          } catch (ParseException e) {
              return defaultNumber;
          }
      }