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

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

const EventEmitter = require("events").EventEmitter;
const util = require("util");

const subscription_service = require("node-opcua-service-subscription");
const read_service = require("node-opcua-service-read");

const DataValue = require("node-opcua-data-value").DataValue;
const Variant = require("node-opcua-variant").Variant;
const StatusCodes = require("node-opcua-status-code").StatusCodes;
const NodeClass = require("node-opcua-data-model").NodeClass;

const AttributeIds = require("node-opcua-data-model").AttributeIds;
const BaseNode = require("node-opcua-address-space").BaseNode;

const sameDataValue = require("node-opcua-data-value").sameDataValue;
const sameVariant = require("node-opcua-variant").sameVariant;
const isValidVariant = require("node-opcua-variant").isValidVariant;

const MonitoringMode = subscription_service.MonitoringMode;
const MonitoringParameters = subscription_service.MonitoringParameters;
const MonitoredItemModifyResult = subscription_service.MonitoredItemModifyResult;
const TimestampsToReturn = read_service.TimestampsToReturn;
const EventFilter = require("node-opcua-service-filter").EventFilter;
const apply_timestamps = require("node-opcua-data-value").apply_timestamps;

const UAVariable = require("node-opcua-address-space").UAVariable;

const defaultItemToMonitor = {indexRange: null, attributeId: read_service.AttributeIds.Value};