Docs request: cluster with multiple apps & namespaces example

Hi, I've been trying to convert my current setup to kubenix. I think some parts like the helm integration work really well and are easy to understand. However, I'm now trying to move some of my own yaml's I wrote to Nix, but I cannot figure out how this project wants me to do namespaces. I'd really appreciate if there was more documentation or an example project on using namespaces. Thanks!