Execute tasks asynchronously and wait for the latest result. Method can be useful in conjunction with pop()/push() methods. In such

Exec the callback or list of callbacks. Return asyncronous results as the TaskSetResult object.

Join to all async results in the tree

Decorator "run with callbacks" Function is useful as decorator for :meth:`run` method of tasks which are subclasses of generic :class:`celery

Create directory. We return CreateDirectoryResult object intentionally, so that task_with_callbacks decorator can add async_result attribute

decorator "task with callbacks" Callback or list of callbacks which go to function in "callbacks" kwarg, will be executed after the function

Check TaskTree execution order. Following tree of tasks is created:: d 0 d 1 - d 1.1 ` d 1.2 - d 1.2.1