/**
  * @access public
  *
  * @param string $file
  * @return bool
  */
 public function exists($file)
 {
     $list = $this->ftp->rawlist($file, '-a');
     if (empty($list) && $this->is_dir($file)) {
         return true;
         // File is an empty directory.
     }
     return !empty($list);
     //empty list = no file, so invert.
     // Return $this->ftp->is_exists($file); has issues with ABOR+426 responses on the ncFTPd server.
 }