How to use this.doNativeFind method in Appium Xcuitest Driver

...70    log.info(`Rewrote incoming selector from '${initSelector}' to ` +71             `'${selector}' to match XCUI type. You should consider ` +72             `updating your tests to use the new selectors directly`);73  }74  return await this.doNativeFind(strategy, selector, mult, context);75};76helpers.doNativeFind = async function doNativeFind (strategy, selector, mult, context) {77  context = util.unwrapElement(context);78  let endpoint = `/element${context ? `/${context}/element` : ''}${mult ? 's' : ''}`;79  let body = {80    using: strategy,81    value: selector82  };83  let method = 'POST';84  // This is either an array is mult === true85  // or an object if mult === false86  let els;87  try {88    await this.implicitWaitForCondition(async () => {89      try {90        els = await this.proxyCommand(endpoint, method, body);91      } catch (err) {92        els = [];93      }94      // we succeed if we get some elements95      return !_.isEmpty(els);96    });97  } catch (err) {98    if (err.message && err.message.match(/Condition unmet/)) {99      // condition was not met setting res to empty array100      els = [];101    } else {102      throw err;103    }104  }105  if (mult) {106    return els;107  }108  if (_.isEmpty(els)) {109    throw new errors.NoSuchElementError();110  }111  return els;112};113helpers.getFirstVisibleChild = async function getFirstVisibleChild (mult, context) {114  log.info(`Getting first visible child`);115  if (mult) {116    throw new Error('Cannot get multiple first visible children!');117  }118  if (!context) {119    throw new Error('Cannot get first visible child without a context element');120  }121  let index = 1;122  // loop through children via class-chain finds, until we run out of children123  // or we find a visible one. This loop looks infinite but its not, because at124  // some point the call to doNativeFind will throw with an Element Not Found125  // error, when the index gets higher than the number of child elements. This126  // is what we want because that error will halt the loop and make it all the127  // way to the client.128  while (true) { // eslint-disable-line no-constant-condition129    const strategy = WDA_CLASS_CHAIN_STRATEGY;130    const selector = `*[${index}]`;131    const nthChild = await this.doNativeFind(strategy, selector, false, context);132    const visible = await this.getAttribute('visible', nthChild);133    if (visible === 'true') {134      log.info(`Found first visible child at position ${index}`);135      return nthChild;136    }137    index++;138  }139};140function rewriteMagicScrollable (mult) {141  const types = [142    'ScrollView',143    'Table',144    'CollectionView',145    'WebView'...