bool GetJoinedParties ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & LocalUserId, [TArray](API\Runtime\Core\Containers\TArray)< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< const [FOnlinePartyId](API\Plugins\OnlineSubsystem\FOnlinePartyId) >> & OutPartyIdArray ) const