How to use the appium-ios-driver.iosCommands.context function in appium-ios-driver

import { iosCommands, IOSPerformanceLog, NATIVE_WIN, WEBVIEW_WIN } from 'appium-ios-driver';
import { createRemoteDebugger, RemoteDebugger } from 'appium-remote-debugger';
import { errors, isErrorType } from 'appium-base-driver';
import { util, timing } from 'appium-support';
import log from '../logger';
import { retryInterval } from 'asyncbox';
import _ from 'lodash';


const WEBVIEW_BASE = `${WEBVIEW_WIN}_`;

let commands = {}, helpers = {}, extensions = {};

Object.assign(extensions, iosCommands.context);

// override, as appium-ios-driver's version uses UI Automation to close
extensions.closeAlertBeforeTest = async function closeAlertBeforeTest () { // eslint-disable-line require-await
  return true;
};

// the appium-ios-driver version has a wait on real devices, which is no longer
// necessary
extensions.navToInitialWebview = async function navToInitialWebview () {
  if (this.useNewSafari()) {
    await this.typeAndNavToUrl();
  } else if (!this.isRealDevice() && this.opts.safari) {
    await this.navToViewThroughFavorites();
  } else {
    await this.navToViewWithTitle(/.*/);
  }

extensions.isWebContext = function isWebContext () {
  return !!this.curContext && this.curContext !== iosCommands.context.NATIVE_WIN;
};