{"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"if"}]}
    if !inferred_outlives.is_empty() {
    let inferred_outlives = tcx.inferred_outlives_of(def_id);
        debug!("predicates_of: inferred_outlives_of({:?}) = {:?}", def_id, inferred_outlives,);