public RouteBuilder methods(HttpMethod... methods) {
        methods(ImmutableSet.copyOf(requireNonNull(methods, "methods")));
        return this;
    }
Sets the {@link Route} to support the specified {@link HttpMethod}s. If not set,
the mapped {@link HttpService} accepts any {@link HttpMethod}s.
core/src/main/java/com/linecorp/armeria/server/RouteBuilder.java