when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>({
  1. required TResult listString(
    1. List<String> value
    ),
  2. required TResult string(
    1. String? value
    ),
})

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?>({
  required TResult Function(List<String> value) listString,
  required TResult Function(String? value) string,
}) {
  final _that = this;
  switch (_that) {
    case ChatCompletionStopListString():
      return listString(_that.value);
    case ChatCompletionStopString():
      return string(_that.value);
  }
}