Slint, Rust, and Generated Code

[NuSkooler]

Hi all! I'm attempting to create a component with a model backed by Rust. My Rust code must reference an exported struct from a companion Slint file, but I'm having issues getting it to work. My structure looks like this:

src/
  main.rs # instantiates App
  side_menu.rs # needs to ref an exported Node struct from side_menu.slint
ui/
  app.slint
  side_menu.slint # exports a Node struct

My build.rs mentions only app.slint. Within main.rs, I create an App, which itself has SideMenu component. Where is Node above exported? I can't seem to reference it in side_menu.rs.

I'm basically attempting to create a SideMenu component modeled after this post.