kryo.register(Collections.singletonMap("", "").getClass(),
new CollectionsSingletonMapSerializer(kryo));
kryo.register(Currency.class, new CurrencySerializer(kryo));
kryo.register(GregorianCalendar.class, new GregorianCalendarSerializer());
kryo.register(InvocationHandler.class, new JdkProxySerializer(kryo));
kryo.register(StringBuffer.class, new StringBufferSerializer(kryo));
kryo.register(StringBuilder.class, new StringBuilderSerializer(kryo));
UnmodifiableCollectionsSerializer.registerSerializers(kryo);
SynchronizedCollectionsSerializer.registerSerializers(kryo);
kryo.register(CGLibProxySerializer.CGLibProxyMarker.class, new CGLibProxySerializer(kryo));
kryo.register(InvocationHandler.class, new JdkProxySerializer(kryo));