{"ast_node_type":"variable","tokens":[{"end":74,"kind":"keyword","start":0,"text":"let"}]}
    let erased_outlives_predicate = tcx.erase_regions(outlives_predicate);
    assert!(!outlives_predicate.has_escaping_bound_vars());
    let outlives_ty = erased_outlives_predicate.skip_binder().0;