whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(double? width, double? height, double? size, @igFreezedJson BoxFit? fit, @igFreezedJson BorderRadius? borderRadius, @igFreezedJson BoxShape? shape, bool enableMemoryCache, String? heroTag, bool isSelected, @igFreezedJson Widget? errorWidget, @igFreezedJson VoidCallback? onTap, @igFreezedJson Color? color, bool clearMemoryCacheIfFailed, bool clearMemoryCacheWhenDispose, bool gaplessPlayback, @igFreezedJson BlendMode? colorBlendMode, FilterQuality filterQuality, double? scale, Map<String, String> headers, bool cache, int retries, @igFreezedJson Duration? timeLimit, @igFreezedJson Duration timeRetry, @igFreezedJson CancellationToken? cancelToken, String? cacheKey, bool printError, bool cacheRawData, String? imageCacheName, @igFreezedJson Duration? cacheMaxAge, int? cacheWidth, int? cacheHeight, double? compressionRatio, int? maxBytes, String? package, @igFreezedJson AssetBundle? bundle, @Doc(message: '自定义完成小部件') @igFreezedJson CustomCompletedWidget? customCompletedWidget, @igFreezedJson Widget? customLoadingWidget, @igFreezedJson InitEditorConfigHandler? initEditorConfigHandler, @igFreezedJson Key? extendedImageEditorKey, @igFreezedJson ExtendedImageMode? mode,)?)

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( double? width,  double? height,  double? size, @igFreezedJson  BoxFit? fit, @igFreezedJson  BorderRadius? borderRadius, @igFreezedJson  BoxShape? shape,  bool enableMemoryCache,  String? heroTag,  bool isSelected, @igFreezedJson  Widget? errorWidget, @igFreezedJson  VoidCallback? onTap, @igFreezedJson  Color? color,  bool clearMemoryCacheIfFailed,  bool clearMemoryCacheWhenDispose,  bool gaplessPlayback, @igFreezedJson  BlendMode? colorBlendMode,  FilterQuality filterQuality,  double? scale,  Map<String, String> headers,  bool cache,  int retries, @igFreezedJson  Duration? timeLimit, @igFreezedJson  Duration timeRetry, @igFreezedJson  CancellationToken? cancelToken,  String? cacheKey,  bool printError,  bool cacheRawData,  String? imageCacheName, @igFreezedJson  Duration? cacheMaxAge,  int? cacheWidth,  int? cacheHeight,  double? compressionRatio,  int? maxBytes,  String? package, @igFreezedJson  AssetBundle? bundle, @Doc(message: '自定义完成小部件')@igFreezedJson  CustomCompletedWidget? customCompletedWidget, @igFreezedJson  Widget? customLoadingWidget, @igFreezedJson  InitEditorConfigHandler? initEditorConfigHandler, @igFreezedJson  Key? extendedImageEditorKey, @igFreezedJson  ExtendedImageMode? mode)?  $default,) {final _that = this;
switch (_that) {
case _ImageParams() when $default != null:
return $default(_that.width,_that.height,_that.size,_that.fit,_that.borderRadius,_that.shape,_that.enableMemoryCache,_that.heroTag,_that.isSelected,_that.errorWidget,_that.onTap,_that.color,_that.clearMemoryCacheIfFailed,_that.clearMemoryCacheWhenDispose,_that.gaplessPlayback,_that.colorBlendMode,_that.filterQuality,_that.scale,_that.headers,_that.cache,_that.retries,_that.timeLimit,_that.timeRetry,_that.cancelToken,_that.cacheKey,_that.printError,_that.cacheRawData,_that.imageCacheName,_that.cacheMaxAge,_that.cacheWidth,_that.cacheHeight,_that.compressionRatio,_that.maxBytes,_that.package,_that.bundle,_that.customCompletedWidget,_that.customLoadingWidget,_that.initEditorConfigHandler,_that.extendedImageEditorKey,_that.mode);case _:
  return null;

}
}