whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String $type,
    2. String src,
    3. int id,
    4. bool isRead,
    5. String reasonType,
    6. String? reason,
    7. String? lastActionTaken,
    8. @ReportViewScopeConverter() ReportViewScope? scope,
    9. @UReportViewSubjectConverter() UReportViewSubject subject,
    10. @ReportViewStatusConverter() ReportViewStatus status,
    11. @JsonKey.new(toJson: iso8601) DateTime createdAt,
    12. @JsonKey.new(toJson: iso8601) DateTime updatedAt,
    13. 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,  String src,  int id,  bool isRead,  String reasonType,  String? reason,  String? lastActionTaken, @ReportViewScopeConverter()  ReportViewScope? scope, @UReportViewSubjectConverter()  UReportViewSubject subject, @ReportViewStatusConverter()  ReportViewStatus status, @JsonKey(toJson: iso8601)  DateTime createdAt, @JsonKey(toJson: iso8601)  DateTime updatedAt,  Map<String, dynamic>? $unknown)?  $default,) {final _that = this;
switch (_that) {
case _ReportView() when $default != null:
return $default(_that.$type,_that.src,_that.id,_that.isRead,_that.reasonType,_that.reason,_that.lastActionTaken,_that.scope,_that.subject,_that.status,_that.createdAt,_that.updatedAt,_that.$unknown);case _:
  return null;

}
}