isCardNumberValid static method
Implementation
static bool isCardNumberValid(String? value) {
if (value == null || value.trim().isEmpty) return false;
var number = CardUtils.getCleanedNumber(value.trim());
//check if formattedNumber is empty or card isn't a whole positive number or isn't Luhn-valid
return isWholeNumberPositive(number) && _isValidLuhnNumber(number);
}