beforeEach(() => {
   model = new Property({
     type: 'stack',
     property: propName,
     properties
   });
   view = new PropertyStackView({
     model,
     propTarget: target
   });
   fixtures.innerHTML = '';
   view.render();
   fixtures.appendChild(view.el);
   model.get('layers').add(layers);
 });
 beforeEach(() => {
   em = new Editor({});
   dcomp = new DomComponents();
   compOpts = { em, componentTypes: dcomp.componentTypes };
   target = new Component({}, compOpts);
   component = new Component({}, compOpts);
   target.model = component;
   model = new Property({
     type: 'stack',
     property: propName,
     properties
   });
   view = new PropertyStackView({
     model
   });
   document.body.innerHTML = '<div id="fixtures"></div>';
   fixtures = document.body.firstChild;
   view.render();
   fixtures.appendChild(view.el);
 });