{"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
        let mut vc = src.source_root_parent_map().into_iter().collect::<Vec<_>>();
        let src = SourceRootConfig { fsc, local_filesets: vec![0, 1, 3] };
        vc.sort_by(|x, y| x.0.0.cmp(&y.0.0));