[erlang-questions] "Calling" question

[Mike Oxford]

Given a supervisor tree of, say, 5, do call the top level supervisor, which
then calls it's next level down "OO style" or do you make calls to lower
level supervisors directly?
In a larger project with multiple applications,


a
...b
......c
.........d

supervisor:start_child(a) (calls into b, into c, into into d)
or
supervisor:start_child(d)...


What is the canonical "recommended way?"

Thanks!

-mox
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