How to use the surveyjs-widgets.select2 function in surveyjs-widgets

import { Component, Input, Output, EventEmitter } from "@angular/core";
import * as SurveyKo from "survey-knockout";
import * as SurveyCreator from "survey-creator";
import * as widgets from "surveyjs-widgets";

import "inputmask/dist/inputmask/phone-codes/phone.js";

widgets.icheck(SurveyKo);
widgets.select2(SurveyKo);
widgets.inputmask(SurveyKo);
widgets.jquerybarrating(SurveyKo);
widgets.jqueryuidatepicker(SurveyKo);
widgets.nouislider(SurveyKo);
widgets.select2tagbox(SurveyKo);
widgets.signaturepad(SurveyKo);
widgets.sortablejs(SurveyKo);
widgets.ckeditor(SurveyKo);
widgets.autocomplete(SurveyKo);
widgets.bootstrapslider(SurveyKo);
//widgets.emotionsratings(SurveyKo);

SurveyCreator.StylesManager.applyTheme("default");

var CkEditor_ModalEditor = {
  afterRender: function(modalEditor, htmlElement) {

import { Component, Input, EventEmitter, Output, OnInit } from '@angular/core';
import * as Survey from 'survey-angular';
import * as widgets from 'surveyjs-widgets';
import * as SurveyPDF from 'survey-pdf';
import 'inputmask/dist/inputmask/phone-codes/phone.js';

widgets.icheck(Survey);
widgets.select2(Survey);
widgets.inputmask(Survey);
widgets.jquerybarrating(Survey);
widgets.jqueryuidatepicker(Survey);
widgets.nouislider(Survey);
widgets.select2tagbox(Survey);
widgets.signaturepad(Survey);
widgets.sortablejs(Survey);
widgets.ckeditor(Survey);
widgets.autocomplete(Survey);
widgets.bootstrapslider(Survey);
widgets.prettycheckbox(Survey);
//widgets.emotionsratings(Survey);

Survey.JsonObject.metaData.addProperty('questionbase', 'popupdescription:text');
Survey.JsonObject.metaData.addProperty('page', 'popupdescription:text');