comindware.core.ui/src/components/toolbar/models/GroupModel.js

Comindware Core UI provides the basic components like editors, lists, dropdowns, popups that we so desperately need while creating Marionette-based single-page applications.

export default Backbone.Model.extend({
    initialize() {
        const items = this.get('items');
        if (Array.isArray(items)) {
            this.set('items', new Backbone.Collection(items));
        }
    }
});