[TOnlineAsyncOpHandle](API\Plugins\OnlineServicesInterface\Online\TOnlineAsyncOpHandle)< [FDeclineLobbyInvitation](API\Plugins\OnlineServicesInterface\Online\FDeclineLobbyInvitation) > DeclineLobbyInvitation ( [FDeclineLobbyInvitation::Params](API\Plugins\OnlineServicesInterface\Online\FDeclineLobbyInvitation\Params) && Params )