whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>({
  1. TResult? paymentIntent(
    1. PaymentIntent paymentIntent
    )?,
  2. TResult? setupIntent(
    1. SetupIntent setupIntent
    )?,
})

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>({TResult? Function( PaymentIntent paymentIntent)?  paymentIntent,TResult? Function( SetupIntent setupIntent)?  setupIntent,}) {final _that = this;
switch (_that) {
case CollectBankAccountPaymentIntentResult() when paymentIntent != null:
return paymentIntent(_that.paymentIntent);case CollectBankAccountSetupIntentResult() when setupIntent != null:
return setupIntent(_that.setupIntent);case _:
  return null;

}
}