Returning a client as *either* cluster or non-cluster, using the common Commander interface?

[GeoffreyPlitt]

My project sometimes uses redis in cluster mode, sometimes not.

I am making a redis-client-creator function using IORedis, and I'd like it to return a single type that works either way.

I notice that both non-cluster and yes-cluster Redis classes inherit from Commander class (https://ioredis.readthedocs.io/en/latest/API/#Commander), so I thought this would be a perfect interface to use as the return type for my client creator.

But Commander is not exported by the IORedis library. It's internal only?

What is a good way for my client-creator function to return a single type that could be either a cluster or non-cluster client?

Or can I do this with ClientContext?

[pvogel1967]

I do it just like this to store my reference:

`private _redis!: Redis | Cluster;`

And when I set up the redis based on the config:

        if (this.config.startupNodes) {
            this.logger.fatal( {startupNodes: this.config.startupNodes }, 'Cluster mode startup');
            this._redis = new Cluster(this.config.startupNodes, {
                ...
            });
        } else {
            this._redis = new Redis(this.config.redis);
        }