/**
  * Copies a file to the given destination.
  *
  * @param mixed sfFilebasePluginFile | string $destination
  * @param boolean $overwrite: If true dest file will be overwritten
  * @return sfFilebasePluginFile $copied_file
  */
 public function copy($destination, $overwrite = false)
 {
     return $this->filebase->copyFile($this, $destination, $overwrite);
 }