code: public static PactDslJsonRootValue date(String format) {
      FastDateFormat instance = FastDateFormat.getInstance(format);
      PactDslJsonRootValue value = new PactDslJsonRootValue();
      value.generators.addGenerator(Category.BODY, "", new DateGenerator(format));
      value.setValue(instance.format(new Date(DATE_2000)));
      value.setMatcher(value.matchDate(format));
      return value;
    }
docs: Value that must match the provided date format
  @param format date format to match