code: @Override
      public ListTasksResult listTasks(ListTasksRequest request) {
          request = beforeClientExecution(request);
          return executeListTasks(request);
      }
docs: <p>
  Returns a list of all the tasks.
  </p>
  
  @param listTasksRequest
  ListTasksRequest
  @return Result of the ListTasks operation returned by the service.
  @throws InvalidRequestException
  This exception is thrown when the client submits a malformed request.
  @sample AWSDataSync.ListTasks
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/datasync-2018-11-09/ListTasks" target="_top">AWS API
  Documentation</a>