[TRequest](API\Plugins\WebAPI\TRequest)< PayloadType > & BindHeaderReceivedCallback ( [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< void(FHttpRequestPtr, const [FString](API\Runtime\Core\Containers\FString) &, const [FString](API\Runtime\Core\Containers\FString) &)> HeaderReceivedCallback )