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() => 'BillingInvoice[amountDue=$amountDue, amountPaid=$amountPaid, attemptCount=$attemptCount, createdAt=$createdAt, creditApplied=$creditApplied, currency=$currency, customerEmail=$customerEmail, discount=$discount, dueDate=$dueDate, id=$id, lineItems=$lineItems, number=$number, numberStr=$numberStr, paidAt=$paidAt, paymentMethod=$paymentMethod, paymentRef=$paymentRef, periodEnd=$periodEnd, periodStart=$periodStart, status=$status, subscriptionId=$subscriptionId, subtotal=$subtotal, tax=$tax, updatedAt=$updatedAt, userId=$userId, voidedAt=$voidedAt]';