Get all Tasks(Tasks,SubTasks, Sub-SubTasks) together

[Hans_Schmidt]

For people stumbling on here: It is now possible to get a list of subtasks:

Enable to fetch sub-task details without task id

I came across an issue where I am unable to fetch sub-task details without task id. As in project stories, I can see events for subtasks contain only subtask id which is not sufficient to fetch project and task details.