text: // Using ES5 (CommonJS) - index.js
  const helpers = require("./helpers.js"); // helpers is an object
  const isNull = helpers.isNull;
  const isUndefined = helpers.isUndefined;
  const isNullOrUndefined = helpers.isNullOrUndefined;
  
  // or if your environment supports Destructuring
  const { isNull, isUndefined, isNullOrUndefined } = require("./helpers.js");
  