whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String $type,
    2. int id,
    3. String type,
    4. @ActionViewScopeConverter() ActionViewScope? scope,
    5. @JsonKey.new(toJson: iso8601) DateTime createdAt,
    6. @JsonKey.new(toJson: iso8601) DateTime? reversedAt,
    7. @JsonKey.new(toJson: iso8601) DateTime? expiresAt,
    8. List<String>? labels,
    9. List<String>? policies,
    10. Map<String, dynamic>? $unknown,
    )?
)

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( String $type,  int id,  String type, @ActionViewScopeConverter()  ActionViewScope? scope, @JsonKey(toJson: iso8601)  DateTime createdAt, @JsonKey(toJson: iso8601)  DateTime? reversedAt, @JsonKey(toJson: iso8601)  DateTime? expiresAt,  List<String>? labels,  List<String>? policies,  Map<String, dynamic>? $unknown)?  $default,) {final _that = this;
switch (_that) {
case _ActionView() when $default != null:
return $default(_that.$type,_that.id,_that.type,_that.scope,_that.createdAt,_that.reversedAt,_that.expiresAt,_that.labels,_that.policies,_that.$unknown);case _:
  return null;

}
}