code: private void addAffixes(char[] container, char[] prefix, char[] suffix) {
  
          // We add affixes only if needed (affix length > 0).
          int pl = prefix.length;
          int sl = suffix.length;
          if (pl != 0) prependPrefix(prefix, pl, container);
          if (sl != 0) appendSuffix(suffix, sl, container);
  
      }
docs: private void addAffixes(boolean isNegative, char[] container) {