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() => '(vendorProductId: $vendorProductId, '
'localizedDescription: $localizedDescription, '
'localizedTitle: $localizedTitle, '
'isFamilyShareable: $isFamilyShareable, '
'regionCode: $regionCode, '
'price: $price, '
'subscription: $subscription)';