when<TResult extends Object?> method

@optionalTypeArgs TResult when<TResult extends Object?>(TResult $default(String $type, String actorDid, DateTime convoCreatedAt, String convoId, DateTime createdAt, int groupMemberCount, String groupName, @EventGroupChatMemberLeftLeaveMethodConverter() EventGroupChatMemberLeftLeaveMethod leaveMethod, String ownerDid, String rev, String subjectDid, Map<String, dynamic>? $unknown,))

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String $type,  String actorDid,  DateTime convoCreatedAt,  String convoId,  DateTime createdAt,  int groupMemberCount,  String groupName, @EventGroupChatMemberLeftLeaveMethodConverter()  EventGroupChatMemberLeftLeaveMethod leaveMethod,  String ownerDid,  String rev,  String subjectDid,  Map<String, dynamic>? $unknown)  $default,) {final _that = this;
switch (_that) {
case _EventGroupChatMemberLeft():
return $default(_that.$type,_that.actorDid,_that.convoCreatedAt,_that.convoId,_that.createdAt,_that.groupMemberCount,_that.groupName,_that.leaveMethod,_that.ownerDid,_that.rev,_that.subjectDid,_that.$unknown);case _:
  throw StateError('Unexpected subclass');

}
}