toString method
A string representation of this object.
Some classes have a default textual representation,
often paired with a static parse
function (like int.parse).
These classes will provide the textual representation as
their string representation.
Other classes have no meaningful textual representation
that a program will care about.
Such classes will typically override toString
to provide
useful information when inspecting the object,
mainly for debugging or logging.
Implementation
@override
String toString() {
return 'CardInfo{cardNumber: ${cardNumber.contains('XX') ? cardNumber : 'hidden'}, holderName: $holderName, expirationYear: $expirationYear, expirationMonth: $expirationMonth, cvv2: ${cvv2 == null ? null : '***'}, brand: $brand, creationDate: $creationDate}';
}