Advice needed: how to send events back from an emulation implementation

I've been working on trying to get clipboard support in here but I keep running into a wall trying to understand the architecture and how to send events back from an emulation client (currently working on on the remote desktop part). What I have right now is an extended `LibeiEmulation` that connects to the clipboard portal and gets notifications from that. I have a wire protocol to send clipboard bits left and right and (I think) they work. What I'm stuck on is a simple thing: I need to send an event back from `LibeiEmulation` - in particular i need to send a "SelectionOwnerChanged" event (sent by the portal when I copy something) which contains mime-types and whatnot. And I need to send a "TransferRequest" event (sent when I paste something). And I cannot for the life of me figure out how I can send something back "up". So basically what I have is: `LibeiEmulation` has a spawned task that receives the SelectionOwnerChanged/TransferRequest signal from the portal. I need to send the data from those signals to the remote end. The remote end will (eventually) reply with some protocol message at which point I can send data. But right now I'm stuck at the "how do I actually notify the remote end from the emulation code". Any hints would be much appreciated, right now I'm stuck and I've stared at this for too long.