void GetActivities ( int64 MaximumNumberOfActivities, [TMap](API\Runtime\Core\Containers\TMap)< [FGuid](API\Runtime\Core\Misc\FGuid), [FConcertClientInfo](API\Plugins\Concert\FConcertClientInfo) > & EndpointClientInfoMap, [TArray](API\Runtime\Core\Containers\TArray)< [FConcertSessionActivity](API\Plugins\ConcertSyncCore\FConcertSessionActivity) > & FetchedActivities ) const