when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String $type,
    2. Blob video,
    3. List<EmbedVideoCaption>? captions,
    4. String? alt,
    5. AspectRatio? aspectRatio,
    6. 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, @BlobConverter()  Blob video, @EmbedVideoCaptionConverter()  List<EmbedVideoCaption>? captions,  String? alt, @AspectRatioConverter()  AspectRatio? aspectRatio,  Map<String, dynamic>? $unknown)  $default,) {final _that = this;
switch (_that) {
case _EmbedVideo():
return $default(_that.$type,_that.video,_that.captions,_that.alt,_that.aspectRatio,_that.$unknown);case _:
  throw StateError('Unexpected subclass');

}
}