typedef TMulticastDelegate_ThreeParams< void, const [FConcertClientInfo](API\Plugins\Concert\FConcertClientInfo) &, const [FConcertSyncActivity](API\Plugins\ConcertSyncCore\FConcertSyncActivity) &, const [FStructOnScope](API\Runtime\CoreUObject\UObject\FStructOnScope) & > FOnActivityAddedOrUpdated