{"ast_node_type":"other","tokens":[{"end":27,"kind":"keyword","start":0,"text":"tcx.is_const_fn(def_id)"}]}
    tcx.is_const_fn(def_id)
fn is_promotable_const_fn(tcx: TyCtxt<'_>, def_id: DefId) -> bool {
        && match tcx.lookup_const_stability(def_id) {