et(type, wrap);
  }
}

function stopListeningIfSignal(type) {
  const wrap = signalWraps.get(type);
  if (wrap !== undefined && process.listenerCount(type) === 0) {
    wrap.close();
    signalWraps.delete(type);
  }
}

module.exports = {
  startListeningIfSignal,
  stopListeningIfSignal
};