{"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"chain!(trait_self_param,"}]}
            chain!(trait_self_param, it.params.iter_lt().map(from_lt_id(it)), toc)
            let trait_self_param = it.has_trait_self_param.then(|| toc.next()).flatten();
        })