any way to organize primitives into a parent/child structure?

[soapcyst]

I've been using nannou for a project where i need to create a ton of different primitives and putting them together. currently I'm using structs to organize the shapes together but it's getting annoying to deal with. is there anyway to organize multiple different shapes into a parent/child node structure?
e.g

• ellipse 1
  • ellipse 2
    • line 1
  • polygon 1
  • etc