map<TResult extends Object?> method

@optionalTypeArgs TResult map<TResult extends Object?>({ required TResult network(MyNetworkImage value), required TResult base64(MyBase64Image value), required TResult filePath(MyFilePathImage value), required TResult asset(MyAssetImage value), })

A switch-like method, using callbacks.

Callbacks receives the raw object, upcasted. It is equivalent to doing:

switch (sealedClass) {
  case final Subclass value:
    return ...;
  case final Subclass2 value:
    return ...;
}

Implementation

@optionalTypeArgs
TResult map<TResult extends Object?>({
  required TResult Function(MyNetworkImage value) network,
  required TResult Function(MyBase64Image value) base64,
  required TResult Function(MyFilePathImage value) filePath,
  required TResult Function(MyAssetImage value) asset,
}) {
  final _that = this;
  switch (_that) {
    case MyNetworkImage():
      return network(_that);
    case MyBase64Image():
      return base64(_that);
    case MyFilePathImage():
      return filePath(_that);
    case MyAssetImage():
      return asset(_that);
  }
}