when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String $type,
    2. int id,
    3. EventType eventType,
    4. String url,
    5. PatternType pattern,
    6. ActionType action,
    7. ReasonType reason,
    8. String createdBy,
    9. DateTime createdAt,
    10. String? comment,
    11. 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, @EventTypeConverter()  EventType eventType,  String url, @PatternTypeConverter()  PatternType pattern, @ActionTypeConverter()  ActionType action, @ReasonTypeConverter()  ReasonType reason,  String createdBy,  DateTime createdAt,  String? comment,  Map<String, dynamic>? $unknown)  $default,) {final _that = this;
switch (_that) {
case _Event():
return $default(_that.$type,_that.id,_that.eventType,_that.url,_that.pattern,_that.action,_that.reason,_that.createdBy,_that.createdAt,_that.comment,_that.$unknown);case _:
  throw StateError('Unexpected subclass');

}
}