events.js

// in the listening view (could be HeroWidgetContainer.js or any view)
// 'someView' could be DashboardView, Footprint, or any View obj
this.listenTo(someView, 'walkthroughEvent1', this.startWalkthrough);

// in someView (that will be emitting events)
this.trigger('walkthroughEvent1');

// if you need to stop listening to an obj's event
this.stopListening(someView, 'walkthroughEvent1');