static Map<NamedSocketAddress, ChannelInitializer<?>> convertPortMap(
            Map<Integer, ChannelInitializer<?>> portsToChannelInitializers) {
        Map<NamedSocketAddress, ChannelInitializer<?>> addrsToInitializers =
                new LinkedHashMap<>(portsToChannelInitializers.size());
        for (Map.Entry<Integer, ChannelInitializer<?>> portToInitializer : portsToChannelInitializers.entrySet()) {
            int portNumber = portToInitializer.getKey();
            addrsToInitializers.put(
                    new NamedSocketAddress("port" + portNumber, new InetSocketAddress(portNumber)),
                    portToInitializer.getValue());
        }
        return Collections.unmodifiableMap(addrsToInitializers);
    }
Keys should be a short string usable in metrics.
zuul-core/src/main/java/com/netflix/zuul/netty/server/Server.java