Solace Go API - Setting custom headers on outbound messages

Hey,
I have started, looking into the der Solace Go API 1.1
solace.dev/go/messaging v1.0.1
I started looking into the processing of incoming messages and then pass them on onto a next channel/topic.
But as far as I can see in the API, there is no way to set custom properties/headers in > an outbound message. The OutboundMessageBuilder has a
MessagePropertiesConfigurationProvider
that only exposes a map with already defined constants as keys.
Am I missing a property call here or is this a gap in the API?

Hey @jan_maretzki ! You can for sure add additional properties to your message when building the outbound message. When you process your incoming message and start building your other message, you can add a .WithPropoerty > to your MessageBuilder as follows
messageBuilder := messagingService.MessageBuilder().

WithProperty("Key", "Value").
WithProperty("Key", "Value")

And on the receiving end you can use message.GetProperties() which returns an sdt.Map of properties
You can see an example here
solace-samples-go/patterns/direct_publisher.go at main · SolaceSamples/solace-samples-go · GitHub

Seemed to be I was too deep in, thanks!