Example for Event Subscription in server

[h2k_toy]

I dont know how the client implementation works, but i assume my server gets notified when a event listener is added or removed or something?

I want to avoid ReportEvent calls to nodes not being observed (because i have a lot of them, maybe a few hundred with thousands of variables.)

I would only need a bool variable that tells, wether there is one or more listeners registered to a node and an apropriate event for updating the subscription.

Is there an example in the sdk for enabling/disabling event notification in the server in terms of active subscription by a client?

Which example is it?

Can you please post some code snippets for doing this?

Thanks in advance!