{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"if"}]}
                    if vis_at_level != old_vis_at_level
                    let old_vis_at_level = old_eff_vis.at_level_mut(l);
                        && vis_at_level.is_at_least(*old_vis_at_level, tcx)