code: function augment(debug) {
    /**
     * Create a child `debug` instance
     * @param {...string} ns The namespaces to add to the child `debug` instance
     * @returns {debug} The child instance
     * @memberof debug
     * @instance
     * @private
    **/
    debug.child = (...ns) => {
      ns = ns.filter(n => n);
      ns.unshift(debug.namespace);
      return createDebug(ns.join(':'));
    };
    return debug;
  }
docs: Augment a [`debug`](https://github.com/visionmedia/debug) instance
  @param {debug} debug The debug instance
  @returns {debug} The debug instance
  @private