code: protected DateFormat handleGetDateFormat(String pattern, ULocale locale) {
          return handleGetDateFormat(pattern, null, locale);
      }
docs: Creates a <code>DateFormat</code> appropriate to this calendar.
  This is a framework method for subclasses to override.  This method
  is responsible for creating the calendar-specific DateFormat and
  DateFormatSymbols objects as needed.
  @param pattern the pattern, specific to the <code>DateFormat</code>
  subclass
  @param locale the locale for which the symbols should be drawn
  @return a <code>DateFormat</code> appropriate to this calendar