app/pods/discoverable-taxonomy-set/role-type/presentation-node/element/controller.js
import { filter } from '@ember/object/computed';
import Controller from '@ember/controller';
export default Controller.extend({
dimensionElement: null,
rootDimensionNodes: filter('model.dimensionNodes.[]', function(node) {
return node.get('parent.id') === undefined;
})
});