/**
* Report success.
*
* In this method, which pushs result object into ->results array.
* you can use flushResult() method to clean up these
* result objects.
*
* @param string $message Success message.
* @param array $extra Extra data.
* @return Result
*/
public function reportSuccess($message, $extra = array())
{
return $this->lastResult = Result::success($message, $extra);
}