docs: function PortalWidget(template, view, context, parentView) {
    this.template = template;
    this.template.view = parentView;
    this.context = context;
    // In case we need DOM events to bubble out of the portal
    // Change eventCore's bubbling to allow for a custom function/property
    // aside from parentNode that can link this.el to this.placeholder
    this.placeholder = null;
    this.el = null;
    this.vtree = null;
  }