mapOrNull<TResult extends Object?> method
- @optionalTypeArgs
- TResult? photo(
- InputStoryContentPhoto value
- TResult? video(
- InputStoryContentVideo 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(InputStoryContentPhoto value)? photo,
TResult? Function(InputStoryContentVideo value)? video,
}) {
final _that = this;
switch (_that) {
case InputStoryContentPhoto() when photo != null:
return photo(_that);
case InputStoryContentVideo() when video != null:
return video(_that);
case _:
return null;
}
}