broker channel vs broker instance

1.js

var filtersChannel = Postal.channel("filters");

function FilterController(options){
  this.region = options.region;
  
  filtersChannel.subscribe("add", (filter) => this.showFilter(filter));
}

FilterController.prototype.showFilter = function(filter){
  var view = new FilterView(filter);
  this.region.show(view);
}

FilterController.prototype.addFilter = function(){
  var addView = new AddFilterView();
  
  addView.on("add", (f) => filtersChannel.publish("add", f));
  
  this.region.show(addView)
}

2.js

function FilterController(options){
  this.region = options.region;
  
  this.filtersChannel = new Backbone.Wreqr.EventAggregator();
  filtersChannel.on("add", (filter) => this.showFilter(filter));
}

FilterController.prototype.showFilter = function(filter){
  var view = new FilterView(filter);
  this.region.show(view);
}

FilterController.prototype.addFilter = function(){
  var addView = new AddFilterView();
  
  addView.on("add", (f) => filtersChannel.trigger("add", f));
  
  this.region.show(addView)
}

In line 5, I think it should be: this.filtersChannel.on("add", (filter) => this.showFilter(filter));
Is it correct?

Thanks a lot for your helpful blog post: "Message Brokers, Channels And JavaScript Zombies" :)