code: @Override
      public UpdateMaintenanceWindowTargetResult updateMaintenanceWindowTarget(UpdateMaintenanceWindowTargetRequest request) {
          request = beforeClientExecution(request);
          return executeUpdateMaintenanceWindowTarget(request);
      }
docs: <p>
  Modifies the target of an existing Maintenance Window. You can't change the target type, but you can change the
  following:
  </p>
  <p>
  The target from being an ID target to a Tag target, or a Tag target to an ID target.
  </p>
  <p>
  IDs for an ID target.
  </p>
  <p>
  Tags for a Tag target.
  </p>
  <p>
  Owner.
  </p>
  <p>
  Name.
  </p>
  <p>
  Description.
  </p>
  <p>
  If a parameter is null, then the corresponding field is not modified.
  </p>
  
  @param updateMaintenanceWindowTargetRequest
  @return Result of the UpdateMaintenanceWindowTarget operation returned by the service.
  @throws DoesNotExistException
  Error returned when the ID specified for a resource, such as a Maintenance Window or Patch baseline,
  doesn't exist.</p>
  <p>
  For information about resource limits in Systems Manager, see <a
  href="http://docs.aws.amazon.com/general/latest/gr/aws_service_limits.html#limits_ssm">AWS Systems
  Manager Limits</a>.
  @throws InternalServerErrorException
  An error occurred on the server side.
  @sample AWSSimpleSystemsManagement.UpdateMaintenanceWindowTarget
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ssm-2014-11-06/UpdateMaintenanceWindowTarget"
  target="_top">AWS API Documentation</a>