code: @Override
      public StartTaskResult startTask(StartTaskRequest request) {
          request = beforeClientExecution(request);
          return executeStartTask(request);
      }
docs: <p>
  Starts a new task from the specified task definition on the specified container instance or instances.
  </p>
  <p>
  Alternatively, you can use <a>RunTask</a> to place tasks for you. For more information, see <a
  href="https://docs.aws.amazon.com/AmazonECS/latest/developerguide/scheduling_tasks.html">Scheduling Tasks</a> in
  the <i>Amazon Elastic Container Service Developer Guide</i>.
  </p>
  
  @param startTaskRequest
  @return Result of the StartTask operation returned by the service.
  @throws ServerException
  These errors are usually caused by a server issue.
  @throws ClientException
  These errors are usually caused by a client action, such as using an action or resource on behalf of a
  user that doesn't have permissions to use the action or resource, or specifying an identifier that is not
  valid.
  @throws InvalidParameterException
  The specified parameter is invalid. Review the available parameters for the API request.
  @throws ClusterNotFoundException
  The specified cluster could not be found. You can view your available clusters with <a>ListClusters</a>.
  Amazon ECS clusters are Region-specific.
  @sample AmazonECS.StartTask
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ecs-2014-11-13/StartTask" target="_top">AWS API
  Documentation</a>