virtual bool RequestReservation ( const [FString](API\Runtime\Core\Containers\FString) & ConnectInfoStr, const [FString](API\Runtime\Core\Containers\FString) & InSessionId, const [FUniqueNetIdRepl](API\Runtime\Engine\GameFramework\FUniqueNetIdRepl) & RequestingPartyLeader, const [TArray](API\Runtime\Core\Containers\TArray)< [FPlayerReservation](API\Plugins\OnlineSubsystemUtils\FPlayerReservation) > & PartyMembers )