code: @Override
      public StartOnDemandAuditTaskResult startOnDemandAuditTask(StartOnDemandAuditTaskRequest request) {
          request = beforeClientExecution(request);
          return executeStartOnDemandAuditTask(request);
      }
docs: <p>
  Starts an on-demand Device Defender audit.
  </p>
  
  @param startOnDemandAuditTaskRequest
  @return Result of the StartOnDemandAuditTask operation returned by the service.
  @throws InvalidRequestException
  The request is not valid.
  @throws ThrottlingException
  The rate exceeds the limit.
  @throws InternalFailureException
  An unexpected error has occurred.
  @throws LimitExceededException
  A limit has been exceeded.
  @sample AWSIot.StartOnDemandAuditTask