code: public static PactDslJsonRootValue hexValue() {
      PactDslJsonRootValue value = new PactDslJsonRootValue();
      value.generators.addGenerator(Category.BODY, "", new RandomHexadecimalGenerator(10));
      value.setValue("1234a");
      value.setMatcher(value.regexp("[0-9a-fA-F]+"));
      return value;
    }
docs: Value that must be encoded as a hexadecimal value