code: @Override
      public StartLifecyclePolicyPreviewResult startLifecyclePolicyPreview(StartLifecyclePolicyPreviewRequest request) {
          request = beforeClientExecution(request);
          return executeStartLifecyclePolicyPreview(request);
      }
docs: <p>
  Starts a preview of the specified lifecycle policy. This allows you to see the results before creating the
  lifecycle policy.
  </p>
  
  @param startLifecyclePolicyPreviewRequest
  @return Result of the StartLifecyclePolicyPreview operation returned by the service.
  @throws ServerException
  These errors are usually caused by a server-side issue.
  @throws InvalidParameterException
  The specified parameter is invalid. Review the available parameters for the API request.
  @throws RepositoryNotFoundException
  The specified repository could not be found. Check the spelling of the specified repository and ensure
  that you are performing operations on the correct registry.
  @throws LifecyclePolicyNotFoundException
  The lifecycle policy could not be found, and no policy is set to the repository.
  @throws LifecyclePolicyPreviewInProgressException
  The previous lifecycle policy preview request has not completed. Please try again later.
  @sample AmazonECR.StartLifecyclePolicyPreview
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ecr-2015-09-21/StartLifecyclePolicyPreview"
  target="_top">AWS API Documentation</a>