filter_routes

# File actionpack/lib/action_dispatch/routing/inspector.rb, line 93
        def filter_routes(filter)
          if filter
            @routes.select do |route|
              route_wrapper = RouteWrapper.new(route)
              filter.any? { |default, value| route_wrapper.send(default) =~ value }
            end
          else
            @routes
          end
        end