whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(String $type, String text, UDraftPostLabels? labels, List<DraftEmbedImage>? embedImages, List<DraftEmbedVideo>? embedVideos, List<DraftEmbedExternal>? embedExternals, List<DraftEmbedRecord>? embedRecords, Map<String, dynamic>? $unknown,)?)

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( String $type,  String text, @UDraftPostLabelsConverter()  UDraftPostLabels? labels, @DraftEmbedImageConverter()  List<DraftEmbedImage>? embedImages, @DraftEmbedVideoConverter()  List<DraftEmbedVideo>? embedVideos, @DraftEmbedExternalConverter()  List<DraftEmbedExternal>? embedExternals, @DraftEmbedRecordConverter()  List<DraftEmbedRecord>? embedRecords,  Map<String, dynamic>? $unknown)?  $default,) {final _that = this;
switch (_that) {
case _DraftPost() when $default != null:
return $default(_that.$type,_that.text,_that.labels,_that.embedImages,_that.embedVideos,_that.embedExternals,_that.embedRecords,_that.$unknown);case _:
  return null;

}
}