class RuboCop::Cop::InternalAffairs::UndefinedConfig

def extract_cop_name(class_node)
  return unless class_node
  segments = [class_node].concat(
    class_node.each_ancestor(:class, :module).take_while do |n|
      n.identifier.short_name != :Cop
    end
  )
  segments.reverse_each.map { |s| s.identifier.short_name }.join('/')
end