when<TResult extends Object?> method
- @optionalTypeArgs
- required TResult notification(
- Notification data
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( Notification data) notification,}) {final _that = this;
switch (_that) {
case UModerationSubjectNotification():
return notification(_that.data);case _:
throw StateError('Unexpected subclass');
}
}