mapOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? mapOrNull<TResult extends Object?>(TResult? $default(_AskOkDialogParams value)?)

A variant of map that fallback to returning null.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>(
  TResult? Function(_AskOkDialogParams value)? $default,
) {
  final _that = this;
  switch (_that) {
    case _AskOkDialogParams() when $default != null:
      return $default(_that);
    case _:
      return null;
  }
}