app/components/versions-menu.js
import { inject as service } from '@ember/service';
import { readOnly } from '@ember/object/computed';
import Component from '@ember/component';
import DropdownSubmenuFixMixin from "../mixins/dropdown-submenu-fix";
export default Component.extend(DropdownSubmenuFixMixin, {
dependencyResolver: service(),
tagName: 'li',
classNames: ['dropdown', 'dropup', 'versions-menu'],
versions: readOnly('dependencyResolver.emberVersions'),
dataVersions: readOnly('dependencyResolver.emberDataVersions')
});