private static <V> Router<V> sequentialRouter(Iterable<V> values, @Nullable V fallbackValue,
                                                  @Nullable BiFunction<Route, V, V> fallbackValueConfigurator,
                                                  Function<V, Route> routeResolver,
                                                  BiConsumer<Route, Route> rejectionHandler,
                                                  boolean isRouteDecorator) {
        rejectDuplicateMapping(values, routeResolver, rejectionHandler);
        return router(false, Lists.newArrayList(values), fallbackValue, fallbackValueConfigurator,
                      routeResolver, isRouteDecorator);
    }
Returns only the sequential implementation of {@link Router}.
core/src/main/java/com/linecorp/armeria/server/Routers.java