code: public static DecimalFormat decimalFormat(final String pattern)
      {
          DecimalFormat decFmt = context.get().getDecimalFormat();
          decFmt.applyPattern(pattern);
          return decFmt;
      }
docs: <p>
  Returns a DecimalFormat instance for the current thread.
  
  @param pattern
  Format pattern that follows the conventions of
  {@link java.text.DecimalFormat DecimalFormat}
  @return a DecimalFormat instance for the current thread