removeForwarder(forwarder) {
    this._forwarders = this._forwarders.filter(item => item !== forwarder);
  }
Removes the specified [`Forwarder`](Forwarder) object from the input.

@param {Forwarder} forwarder The [`Forwarder`](Forwarder) to remove (the
[`Forwarder`](Forwarder) object is returned when calling `addForwarder()`.