Custom notifications?

Just curious... You know when we gather stuff, loot stuff, etc. we have these rolling notifications on the bottom right. Can we create custom notifications and push them in there so Rust handles them, instead of re-creating a totally parallel system using GUI?

Could I just call a function like Rust.PushNotification("Hello world"); (totally making this up -- just an example) and have them show on the client?

 

Last time I checked we can't, it is a client console command that uses an item id as argument to display the item, doesn't take any other input sadly.