Function find_template 

pub fn find_template(
    namespace: &[SmolStr],
    name: &str,
    scope: &Namespace,
    generics: &Generics,
) -> Option<usize>

The generic declaration namespace::name names, as an index into Generics::templates.

A name written behind a module path resolves only to the declaration that module makes, so two modules each declaring Slot<T> stay apart. A name written on its own resolves in the scope it was written in, which holds the file’s own declarations and the ones its bare imports merged in; when that scope has none it falls back to the last declaration of the name anywhere in the program, which is where a name reaches a template registered while a body was being compiled.