# File lib/grape/util/inheritable_setting.rb, line 48
      def inherit_from(parent)
        return if parent.nil?

        self.parent = parent

        namespace_inheritable.inherited_values = parent.namespace_inheritable
        namespace_stackable.inherited_values = parent.namespace_stackable
        namespace_reverse_stackable.inherited_values = parent.namespace_reverse_stackable
        self.route = parent.route.merge(route)

        point_in_time_copies.map { |cloned_one| cloned_one.inherit_from parent }
      end