@Override
    public VirtualHostDecoratingServiceBindingBuilder routeDecorator() {
        return new VirtualHostDecoratingServiceBindingBuilder(this);
    }
Returns a {@link VirtualHostDecoratingServiceBindingBuilder} which is for binding
a {@code decorator} fluently. The specified decorator(s) is/are executed in reverse order of
the insertion.
core/src/main/java/com/linecorp/armeria/server/VirtualHostBuilder.java