when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String $type,
    2. int id,
    3. @NotificationReasonConverter() NotificationReason reason,
    4. @UNotificationTargetConverter() UNotificationTarget target,
    5. bool isRead,
    6. @JsonKey.new(toJson: iso8601) DateTime createdAt,
    7. Map<String, dynamic>? $unknown,
    )
)

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String $type,  int id, @NotificationReasonConverter()  NotificationReason reason, @UNotificationTargetConverter()  UNotificationTarget target,  bool isRead, @JsonKey(toJson: iso8601)  DateTime createdAt,  Map<String, dynamic>? $unknown)  $default,) {final _that = this;
switch (_that) {
case _Notification():
return $default(_that.$type,_that.id,_that.reason,_that.target,_that.isRead,_that.createdAt,_that.$unknown);case _:
  throw StateError('Unexpected subclass');

}
}