{"ast_node_type":"variable","tokens":[{"end":59,"kind":"keyword","start":0,"text":"let"}]}
    let module_def = ctx.sema.to_def(&outermost_mod_decl)?;
        iter::successors(Some(module_ast.clone()), |module| module.parent()).last()?;
    let parent_module = module_def.parent(ctx.db())?;