whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<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 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 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() when $default != null:
return $default(_that.url,_that.alt,_that.aspectRatio,_that.loading,_that.onTapCallback);case _:
  return null;

}
}