whenOrNull<TResult extends Object?> method
TResult?
whenOrNull<TResult extends Object?>(
- TResult? $default(
- bool autoShow,
- RefreshController<
T> ? controller, - SearchSupportCoreUiBuild childBuilder,
- SearchSupportActionListening? listening,
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(
bool autoShow,
RefreshController<T>? controller,
SearchSupportCoreUiBuild childBuilder,
SearchSupportActionListening? listening)?
$default,
) {
final _that = this;
switch (_that) {
case _SearchSupportParams() when $default != null:
return $default(_that.autoShow, _that.controller, _that.childBuilder,
_that.listening);
case _:
return null;
}
}