when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String url,
    2. String? alt,
    3. @JsonKey.new(name: 'aspect_ratio') String aspectRatio,
    4. bool loading,
    5. @JsonKey.new(name: 'on_tap_callback') OnTapCallback? onTapCallback,
    )
)

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 url,  String? alt, @JsonKey(name: 'aspect_ratio')  String aspectRatio,  bool loading, @JsonKey(name: 'on_tap_callback')  OnTapCallback? onTapCallback)  $default,) {final _that = this;
switch (_that) {
case _RichImage():
return $default(_that.url,_that.alt,_that.aspectRatio,_that.loading,_that.onTapCallback);case _:
  throw StateError('Unexpected subclass');

}
}