{"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"type_ns:"}]}
                type_ns: vec![Rib::new(start_rib_kind)],
                value_ns: vec![Rib::new(start_rib_kind)],
                macro_ns: vec![Rib::new(start_rib_kind)],