private CompletableFuture<DescribeTasksResponse> describeTasks(List<String> arns) {
    return ecs.describeTasks(describeRequest.copy().tasks(arns).build());
  }
Wrapper around paginated ECS list/describe Task APIs that efficiently describes all tasks.
scheduling-manager/src/main/java/com/amazonaws/blox/scheduling/state/TaskLister.java