react-native-navigation/autolink/postlink/stringUtils.js

 // @ts-check

 /**
   * @param {string} to
   * @param {number} fromIndex
   * @param {string} what
   */
  function insertString(to, fromIndex, what) {
    return to.substring(0, fromIndex) + what + to.substring(fromIndex, to.length);
  }

  module.exports = {
    insertString
  }