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Sometimes I have the need to obtain the Pid of a certain supervisor child. This often happens when the children form a work unit of cooperating processes, wherein one needs to talk to another.
To obtain such a Pid, currently I have to use
which_children/1
to obtain a list of all children, then filter out the one I need, which is boilerplate code repeated over and over.This PR adds a function
which_child/2
, which can be used to obtain the same information aswhich_children/1
does, but for a particular single child.