when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String $type,
    2. String? text,
    3. @RichtextFacetConverter() List<RichtextFacet>? facets,
    4. @ReplyRefConverter() ReplyRef reply,
    5. @UFeedReplyMediaConverter() UFeedReplyMedia? media,
    6. List<String>? langs,
    7. @UFeedReplyLabelsConverter() UFeedReplyLabels? labels,
    8. DateTime createdAt,
    9. 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,  String? text, @RichtextFacetConverter()  List<RichtextFacet>? facets, @ReplyRefConverter()  ReplyRef reply, @UFeedReplyMediaConverter()  UFeedReplyMedia? media,  List<String>? langs, @UFeedReplyLabelsConverter()  UFeedReplyLabels? labels,  DateTime createdAt,  Map<String, dynamic>? $unknown)  $default,) {final _that = this;
switch (_that) {
case _FeedReplyRecord():
return $default(_that.$type,_that.text,_that.facets,_that.reply,_that.media,_that.langs,_that.labels,_that.createdAt,_that.$unknown);case _:
  throw StateError('Unexpected subclass');

}
}