cribers() {
    return false;
  }

  publish() {}
}

const channels = ObjectCreate(null);

function channel(name) {
  let channel;
  const ref = channels[name];
  if (ref) channel = ref.get();
  if (channel) return channel;

  if (typeof name !== 'string' && typeof name !== 'symbol') {
    throw new ERR_INVALID_ARG_TYPE('channel', ['string', 'symbol'], name);
  }

  channel = new Channel(name);
  channels[name] = new WeakReference(channel);
  return channel;
}

function hasSubscribers(name) {
  let channel;
  const ref = channels[name];
  if (ref) channel = ref.get();
  if (!channel) {
    return false;
  }

  return channel.hasSubscribers;
}

module.exports = {
  channel,
  hasSubscribers,
  Channel
};