code: function makeDir(dir) {
      return new Promise(function ($return, $error) {
          var res;
          return Promise.resolve(makePromise(fs.mkdir, dir, dir)).then(function ($await_8) {
              try {
                  res = $await_8;
                  return $return(res);
              } catch ($boundEx) {
                  return $error($boundEx);
              }
          }.bind(this), $error);
      }.bind(this));
  }
docs: Promisified fs.mkdir
  @param {string} dir directory name
  @returns {string} created directory name