whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>({ TResult? listViewBasic(ListViewBasic data)?, TResult? listView(ListView data)?, })

A variant of when that fallback to returning null

It is equivalent to doing:

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

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>({TResult? Function( ListViewBasic data)?  listViewBasic,TResult? Function( ListView data)?  listView,}) {final _that = this;
switch (_that) {
case UModerationSubjectUserListListViewBasic() when listViewBasic != null:
return listViewBasic(_that.data);case UModerationSubjectUserListListView() when listView != null:
return listView(_that.data);case _:
  return null;

}
}