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< # clear out child with given name
---
> # clear out child with given name. This code is not likely to be exercised.
> # See comment in add_child.
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> # This code path had an undiscovered bug that would make it fail
> # at runtime. It had been here for a long time and was only
> # exposed by a buggy script. Changes here will probably not be
> # exercised without specialized testing.