kryo.register( Collections.EMPTY_SET.getClass(), new CollectionsEmptySetSerializer() );
kryo.register( Collections.singletonList( "" ).getClass(), new CollectionsSingletonListSerializer( kryo ) );
kryo.register( Collections.singleton( "" ).getClass(), new CollectionsSingletonSetSerializer( kryo ) );
kryo.register( Collections.singletonMap( "", "" ).getClass(), new CollectionsSingletonMapSerializer( kryo ) );
kryo.register( Class.class, new ClassSerializer( kryo ) );
kryo.register( BigDecimal.class, new BigDecimalSerializer() );
kryo.register( BigInteger.class, new BigIntegerSerializer() );
kryo.register( GregorianCalendar.class, new GregorianCalendarSerializer() );
kryo.register( InvocationHandler.class, new JdkProxySerializer( kryo ) );
UnmodifiableCollectionsSerializer.registerSerializers( kryo );
SynchronizedCollectionsSerializer.registerSerializers( kryo );