code: function existsSync(path) {
      if ( path === null || path === undefined )
          return false;
  
      try {
          Fs.statSync(path);
          return true;
      } catch (err) {
          return checkErr(err);
      }
  }
docs: check if a given path exists, this is the sync version of FireFs.exists
  @method existsSync
  @param {string} path
  @return {boolean}