code: public void printTo(StringBuffer buf, ReadablePeriod period) {
          checkPrinter();
          checkPeriod(period);
          
          getPrinter().printTo(buf, period, iLocale);
      }
docs: Prints a ReadablePeriod to a StringBuffer.
  
  @param buf  the formatted period is appended to this buffer
  @param period  the period to format, not null