whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. XrayAddress? address,
    2. int? port,
    3. int? level,
    4. String? email,
    5. @JsonKey.new(name: 'id') String? id,
    6. String? flow,
    7. String? seed,
    8. String? encryption,
    9. VLessReverseConfig? reverse,
    10. int? testpre,
    11. List<int>? testseed,
    12. @JsonKey.new(name: 'vnext') List<VLessOutboundVnext>? vnext,
    )?
)

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( XrayAddress? address,  int? port,  int? level,  String? email, @JsonKey(name: 'id')  String? id,  String? flow,  String? seed,  String? encryption,  VLessReverseConfig? reverse,  int? testpre,  List<int>? testseed, @JsonKey(name: 'vnext')  List<VLessOutboundVnext>? vnext)?  $default,) {final _that = this;
switch (_that) {
case _VLessOutboundConfig() when $default != null:
return $default(_that.address,_that.port,_that.level,_that.email,_that.id,_that.flow,_that.seed,_that.encryption,_that.reverse,_that.testpre,_that.testseed,_that.vnext);case _:
  return null;

}
}