static [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< const [FOnlinePartyId](API\Plugins\OnlineSubsystem\FOnlinePartyId) > GetSetKey ( TPair< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< const [FOnlinePartyId](API\Plugins\OnlineSubsystem\FOnlinePartyId) >, ValueType > const & Element )