{"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"ty::BoundRegionKind::Named(def_id)"}]}
            ty::BoundRegionKind::Named(def_id) => self.type_checker.tcx().item_name(def_id),
            ty::BoundRegionKind::Anon => sym::anon,
            ty::BoundRegionKind::ClosureEnv => sym::env,