class ActiveAdmin::Router

def define_root_routes
  namespaces.each do |namespace|
    if namespace.root?
      router.root namespace.root_to_options.merge(to: namespace.root_to)
    else
      router.namespace namespace.name, namespace.route_options.dup do
        router.root namespace.root_to_options.merge(to: namespace.root_to, as: :root)
      end
    end
  end
end