code: public static final Parser<Date> instance() { // NOPMD it's thread save!
      if (DateParser.instanceParser == null) {
        synchronized (DateParser.class) {
          if (DateParser.instanceParser == null) {
            DateParser.instanceParser = new DateParser("yyyy-MM-dd");
          }
        }
      }
      return DateParser.instanceParser;
    }
docs: returns the instance.
  
  @return Parser