code: function(){
      if (this.collection){
        this.listenTo(this.collection, "add", this.addChildView, this);
        this.listenTo(this.collection, "remove", this.removeItemView, this);
        this.listenTo(this.collection, "reset", this._renderChildren, this);
      }
    }
docs: Configured the initial events that the composite view binds to. Override this method to prevent the initial events, or to add your own initial events.