public function previewNews($message, $to, $by = self::PREVIEW_BY_OPENID)
    {
        return $this->preview(self::MSG_TYPE_NEWS, $message, $to, $by);
    }
public function previewNews($message, $to, $by = self::PREVIEW_BY_OPENID)
    {
        return $this->preview(self::MSG_TYPE_NEWS, $message, $to, $by);
    }
public function previewNews ( $ message , $ to , $ by = self :: PREVIEW_BY_OPENID ) { return $ this -> preview ( self :: MSG_TYPE_NEWS , $ message , $ to , $ by ) ; }
Preview a news message.

@param mixed  $message message
@param string $to
@param string $by

@return mixed
Preview a news message .