root

# File actionpack/lib/action_dispatch/routing/mapper.rb, line 1565
        def root(path, options={})
          if path.is_a?(String)
            options[:to] = path
          elsif path.is_a?(Hash) and options.empty?
            options = path
          else
            raise ArgumentError, "must be called with a path and/or options"
          end

          if @scope.resources?
            with_scope_level(:root) do
              scope(parent_resource.path) do
                super(options)
              end
            end
          else
            super(options)
          end
        end