code: public static String driversLicense() {
          StringBuffer dl = new StringBuffer(JDefaultAddress.stateAbbr());
          dl.append("-");
          dl.append(JDefaultNumber.randomNumberString(8));
  
          return dl.toString();
      }
docs: Creates a Driver's license in the format of 2 Letter State Code, Dash, 8 Digit Random Number
  ie CO-12345678
  
  @return driver's license string