code: public static boolean isAnyCard(String ccPassed) {
          if (isEmpty(ccPassed)) return defaultEmptyOK;
  
          String cc = stripCharsInBag(ccPassed, creditCardDelimiters);
  
          if (!isCreditCard(cc)) return false;
          if (isMasterCard(cc) || isVisa(cc) || isAmericanExpress(cc) || isDinersClub(cc) ||
                  isDiscover(cc) || isEnRoute(cc) || isJCB(cc))
              return true;
          return false;
      }
docs: Checks to see if the cc number is a valid number for any accepted credit card
  @param     ccPassed - a string representing a credit card number
  @return  true, if the credit card number is any valid credit card number for any of the accepted card types, false otherwise