select2 add option with new keyword

select2 createTag

createTag: function (params) {
                    return {
                        id: params.term,
                        text: params.term,
                        newOption: true
                    }
                },
                templateResult: function (data) {
                    var $result = $("<span></span>");

                    $result.text(data.text);

                    if (data.newOption) {
                        $result.append(" <em class='text-danger'>(new)</em>");
                    }

                    return $result;
                }