FConcertMessageContext ( const [FGuid](API\Runtime\Core\Misc\FGuid) & InSenderConcertEndpointId, const [FDateTime](API\Runtime\Core\Misc\FDateTime) & InUtcNow, const [FConcertMessageData](API\Plugins\ConcertTransport\FConcertMessageData) * InMessage, const [UScriptStruct](API\Runtime\CoreUObject\UObject\UScriptStruct) * InMessageType, const [TMap](API\Runtime\Core\Containers\TMap)< [FName](API\Runtime\Core\UObject\FName), [FString](API\Runtime\Core\Containers\FString) > & InAnnotations )