How to use the @material-ui/system/memoize function in @material-ui/system

import mapTranslations from 'docs/src/modules/utils/mapTranslations';

const req = require.context('docs/translations', false, /translations.*\.json$/);
const translations = mapTranslations(req, 'json');

function getPath(obj, path) {
  if (!path || typeof path !== 'string') {
    return null;
  }

  return path.split('.').reduce((acc, item) => (acc && acc[item] ? acc[item] : null), obj);
}

const warnOnce = {};

const getT = memoize(userLanguage => (key, options = {}) => {
  const { ignoreWarning = false } = options;
  const wordings = translations[userLanguage];

  if (!wordings) {
    console.error(`Missing language: ${userLanguage}.`);
    return '…';
  }

  const translation = getPath(wordings, key);

  if (!translation) {
    const fullKey = `${userLanguage}:${key}`;
    // No warnings in CI env
    if (!ignoreWarning && !warnOnce[fullKey] && typeof window !== 'undefined') {
      console.error(`Missing translation for ${fullKey}.`);
      warnOnce[fullKey] = true;