when<TResult extends Object?> method

@optionalTypeArgs TResult when<TResult extends Object?>(TResult $default(bool autoShow, RefreshController<T>? controller, SearchSupportCoreUiBuild childBuilder, SearchSupportActionListening? listening,))

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?>(
  TResult Function(
          bool autoShow,
          RefreshController<T>? controller,
          SearchSupportCoreUiBuild childBuilder,
          SearchSupportActionListening? listening)
      $default,
) {
  final _that = this;
  switch (_that) {
    case _SearchSupportParams():
      return $default(_that.autoShow, _that.controller, _that.childBuilder,
          _that.listening);
  }
}