mapOrNull<TResult extends Object?> method
- @optionalTypeArgs
- TResult? user(
- UModerationCauseSourceUser value
- TResult? list(
- UModerationCauseSourceList value
- TResult? labeler(
- UModerationCauseSourceLabeler 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( UModerationCauseSourceUser value)? user,TResult? Function( UModerationCauseSourceList value)? list,TResult? Function( UModerationCauseSourceLabeler value)? labeler,}){
final _that = this;
switch (_that) {
case UModerationCauseSourceUser() when user != null:
return user(_that);case UModerationCauseSourceList() when list != null:
return list(_that);case UModerationCauseSourceLabeler() when labeler != null:
return labeler(_that);case _:
return null;
}
}