whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(String $type, String actorDid, DateTime convoCreatedAt, String convoId, DateTime createdAt, int groupMemberCount, String groupName, String? joinLinkCode, bool? joinLinkFollowersOnly, bool? joinLinkRequiresApproval, @EventGroupChatUpdatedLockReasonConverter() EventGroupChatUpdatedLockReason? lockReason, String? newName, String? oldName, String ownerDid, String rev, @EventGroupChatUpdatedUpdateTypeConverter() EventGroupChatUpdatedUpdateType updateType, 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 actorDid,  DateTime convoCreatedAt,  String convoId,  DateTime createdAt,  int groupMemberCount,  String groupName,  String? joinLinkCode,  bool? joinLinkFollowersOnly,  bool? joinLinkRequiresApproval, @EventGroupChatUpdatedLockReasonConverter()  EventGroupChatUpdatedLockReason? lockReason,  String? newName,  String? oldName,  String ownerDid,  String rev, @EventGroupChatUpdatedUpdateTypeConverter()  EventGroupChatUpdatedUpdateType updateType,  Map<String, dynamic>? $unknown)?  $default,) {final _that = this;
switch (_that) {
case _EventGroupChatUpdated() when $default != null:
return $default(_that.$type,_that.actorDid,_that.convoCreatedAt,_that.convoId,_that.createdAt,_that.groupMemberCount,_that.groupName,_that.joinLinkCode,_that.joinLinkFollowersOnly,_that.joinLinkRequiresApproval,_that.lockReason,_that.newName,_that.oldName,_that.ownerDid,_that.rev,_that.updateType,_that.$unknown);case _:
  return null;

}
}