{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":".filter_map(ty::Binder::no_bound_vars)"}]}
        .filter_map(ty::Binder::no_bound_vars)
        .filter_map(ty::Clause::as_region_outlives_clause)
        .map(|ty::OutlivesPredicate(r_a, r_b)| OutlivesBound::RegionSubRegion(r_b, r_a))