code: @Deprecated
      protected StringBuffer applyRules(final Calendar calendar, final StringBuffer buf) {
          return printer.applyRules(calendar, buf);
      }
docs: <p>Performs the formatting by applying the rules to the
  specified calendar.</p>
  
  @param calendar the calendar to format
  @param buf  the buffer to format into
  @return the specified string buffer
  @deprecated Use {@link #format(Calendar, Appendable)}