text: define( [ "troopjs-core/component/widget", "jquery" ], function DisplayModule(Widget, $) {
  
  	function filter(item, index) {
  		return item === null;
  	}
  
  	return Widget.extend({
  		"hub:memory/todos/change": function onChange(topic, items) {
  			this.$element[$.grep(items, filter, true).length > 0 ? "show" : "hide"]();
  		}
  	});
  });
  