text: 
  exports.existsSync = function (file) {
    // if this file exists selenium-webdriver considers devmode=true
    if (file.endsWith('build.desc')) {
      return false;
    }
    throw new Error(`Alias not found fo fs.existsSync, file = ${file}`);
  };
  
  exports.readFile = function (file, mode, callback) {
    if (file.startsWith('/atoms/getAttribute.js')) {
      const content = require('raw-loader!selenium-webdriver/lib/atoms/getAttribute.js');
      callback(null, content);
      return;
    }
    if (file.startsWith('/atoms/is-displayed.js')) {
      const content = require('raw-loader!selenium-webdriver/lib/atoms/is-displayed.js');
      callback(null, content);
      return;
    }
    throw new Error(`Alias not found fo fs.readFile, file = ${file}`);
  };
  
  