whenOrNull<TResult extends Object?> method
- @optionalTypeArgs
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(@JsonKey(name: 'prompt_tokens') int promptTokens,
@JsonKey(name: 'total_tokens') int totalTokens)?
$default,
) {
final _that = this;
switch (_that) {
case _EmbeddingUsage() when $default != null:
return $default(_that.promptTokens, _that.totalTokens);
case _:
return null;
}
}