code: private DescribeAlarmsResponse describeAlarms() {
          DescribeAlarmsResponse ret = new DescribeAlarmsResponse();
          DescribeAlarmsResult result = new DescribeAlarmsResult();
          MetricAlarms metricAlarms = new MetricAlarms();
  
          MetricAlarm metricAlarm = new MetricAlarm();
          metricAlarm.setAlarmDescription("CPU usage exceeds 70 percent");
          metricAlarm.setAlarmName("AwsMockAlarmCPU");
          metricAlarms.getMember().add(metricAlarm);
  
          metricAlarm = new MetricAlarm();
          metricAlarm.setAlarmDescription("Memory usage exceeds 80 percent");
          metricAlarm.setAlarmName("AwsMockAlarmMemory");
          metricAlarms.getMember().add(metricAlarm);
  
          result.setMetricAlarms(metricAlarms);
  
          ret.setDescribeAlarmsResult(result);
          ResponseMetadata responseMetadata = new ResponseMetadata();
          responseMetadata.setRequestId(UUID.randomUUID().toString());
          ret.setResponseMetadata(responseMetadata);
          return ret;
      }
docs: Handles "describeAlarms" request.
  
  @return a GetMetricStatisticsResult for metricName.