Checking downstream "dependencies".

[johnclinaa]

I have played around with the Luigi framework and see that it is great at checking "upstream" dependencies: If I run job A, Luigi will check to make sure all other jobs that A depends on is current. The visualization tool also display this dependency graph.

Is there a method or visualization command where I can check for downstream dependencies? That is, for task A, what are the other tasks downstream that depends on task A. This is useful in determing the effect and impact of a task on other tasks.

[Tarrasch]

Same as #286 (also closed)