code: @Override
      public CancelConversionTaskResult cancelConversionTask(CancelConversionTaskRequest request) {
          request = beforeClientExecution(request);
          return executeCancelConversionTask(request);
      }
docs: <p>
  Cancels an active conversion task. The task can be the import of an instance or volume. The action removes all
  artifacts of the conversion, including a partially uploaded volume or instance. If the conversion is complete or
  is in the process of transferring the final disk image, the command fails and returns an exception.
  </p>
  <p>
  For more information, see <a
  href="https://docs.aws.amazon.com/AWSEC2/latest/CommandLineReference/ec2-cli-vmimport-export.html">Importing a
  Virtual Machine Using the Amazon EC2 CLI</a>.
  </p>
  
  @param cancelConversionTaskRequest
  Contains the parameters for CancelConversionTask.
  @return Result of the CancelConversionTask operation returned by the service.
  @sample AmazonEC2.CancelConversionTask
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/CancelConversionTask" target="_top">AWS API
  Documentation</a>