class AkamaiAddressKeyResolver implements KeyResolver {

    @Override
    public String resolve(HttpServerExchange exchange) {<FILL_FUNCTION_BODY>}
}

        String key = "127.0.0.1";
        HeaderMap headerMap = exchange.getResponseHeaders();
        HeaderValues values = headerMap.get("True-Client-IP");
        if(values != null) key = values.getFirst();
        return key;
    
<no_super_class>