How to use the node-opcua-address-space.UADataType function in node-opcua-address-space

module.exports.ServerEngine = require("node-opcua-server").ServerEngine;
module.exports.MonitoredItem = require("node-opcua-server").MonitoredItem;
module.exports.ServerSession = require("node-opcua-server").ServerSession;
module.exports.Subscription = require("node-opcua-server").Subscription;
module.exports.MonitoredItem = require("node-opcua-server").MonitoredItem;

module.exports.generate_address_space = require("node-opcua-address-space").generate_address_space;
module.exports.AddressSpace = require("node-opcua-address-space").AddressSpace;
module.exports.Namespace = require("node-opcua-address-space").Namespace;

module.exports.SessionContext = require("node-opcua-address-space").SessionContext;
// basic opcua NodeClass
module.exports.UAObject = require("node-opcua-address-space").UAObject;
module.exports.UAMethod = require("node-opcua-address-space").UAMethod;
module.exports.UAVariable = require("node-opcua-address-space").UAVariable;
module.exports.UADataType = require("node-opcua-address-space").UADataType;

module.exports.getAddressSpaceFixture = require("node-opcua-address-space/test_helpers/get_address_space_fixture").getAddressSpaceFixture;
module.exports.OPCUADiscoveryServer = require("node-opcua-server-discovery").OPCUADiscoveryServer;

module.exports.basic_types = require("node-opcua-basic-types");

// version
module.exports.version = require("./package.json").version;

module.exports.nodesets = require("node-opcua-nodesets");
module.exports.constructNodesetFilename = module.exports.nodesets.constructNodesetFilename;
module.exports.standard_nodeset_file = module.exports.nodesets.standard_nodeset_file;
module.exports.di_nodeset_filename = module.exports.nodesets.di_nodeset_filename;
module.exports.adi_nodeset_filename = module.exports.nodesets.adi_nodeset_filename;

// an incomplete but sufficient nodeset file used during testing

/* istanbul ignore file */
"use strict";

const assert = require("node-opcua-assert").assert;
const _ = require("underscore");

const path = require("path");
const fs = require("fs");

const resolveNodeId = require("node-opcua-nodeid").resolveNodeId;
const AddressSpace = require("node-opcua-address-space").AddressSpace;
const UADataType = require("node-opcua-address-space").UADataType;

const normalize_require_file = require("node-opcua-utils").normalize_require_file;
const LineFile = require("node-opcua-utils").LineFile;
const lowerFirstLetter = require("node-opcua-utils").lowerFirstLetter;

const hasConstructor = require("node-opcua-factory").hasConstructor;
const getConstructor = require("node-opcua-factory").getConstructor;
const hasEnumeration = require("node-opcua-factory").hasEnumeration;
const getEnumeration = require("node-opcua-factory").getEnumeration;

const crypto = require("crypto");

function hashNamespace(namespaceUri) {
    const hash = crypto
        .createHash("sha1")
        .update(namespaceUri)