code: @Override
      public ModifyReservedInstancesResult modifyReservedInstances(ModifyReservedInstancesRequest request) {
          request = beforeClientExecution(request);
          return executeModifyReservedInstances(request);
      }
docs: <p>
  Modifies the Availability Zone, instance count, instance type, or network platform (EC2-Classic or EC2-VPC) of
  your Reserved Instances. The Reserved Instances to be modified must be identical, except for Availability Zone,
  network platform, and instance type.
  </p>
  <p>
  For more information, see <a
  href="https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ri-modifying.html">Modifying Reserved Instances</a> in
  the Amazon Elastic Compute Cloud User Guide.
  </p>
  
  @param modifyReservedInstancesRequest
  Contains the parameters for ModifyReservedInstances.
  @return Result of the ModifyReservedInstances operation returned by the service.
  @sample AmazonEC2.ModifyReservedInstances
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/ModifyReservedInstances" target="_top">AWS
  API Documentation</a>