def get_single_alert(alert_id)
      ret = http_get('/alert/' + alert_id)
      val = Alert.new(ret)
      val
    end
def get_single_alert(alert_id)
      ret = http_get('/alert/' + alert_id)
      val = Alert.new(ret)
      val
    end
Retrieve a single Alert by its id
 @param [String] alert_id id of the alert to fetch
 @return [Alert] Alert object retrieved