Namespace pattern for Apps Script - Bruce McPherson

const Main = ( () => {
  const ca ='public';
  const cb ='private';
  
  // we'll export this function
  const fa = () => `${ca}:${cb}`;
  
  // but not these
  const fb = () => fa();
  const fc = () => fb();
  
  // this is a little like export
  // just expose the things you want public
  return {
    fa,
    ca
  };
})();