code: function ( options ) {
                  _.bindAll( this, "selectNext", "selectPrev", "onSelect", "render" );
                  this.collection = options.collection;
                  this.listenTo( this.collection, "select:one", this.onSelect );
                  this.listenTo( this.collection, "remove", this.render );
                  this.render();
              }
docs: A base class. Extend, don't instantiate. By default, render is a no-op. Override if necessary.