Protected class methods are seemingly useless
Protected class methods are seemingly useless

This is why protected_class_method doesn't exist:
From Matz directly: http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/245072

Either make them private_class_method or keep them public.
Since normalized_type and renice can called from the outside, keep them public,
as it was now because of the useless protected call on a class method.

rubocop --only UselessAccessModifier

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