public static void deregister() {
converters.clear();
converters.put(BigDecimal.class, new BigDecimalConverter());
converters.put(BigInteger.class, new BigIntegerConverter());
converters.put(Boolean.TYPE, new BooleanConverter(defaultBoolean));
converters.put(Boolean.class, new BooleanConverter(defaultBoolean));
converters.put(Byte.TYPE, new ByteConverter(defaultByte));
converters.put(Byte.class, new ByteConverter(defaultByte));
converters.put(Character.TYPE,
new CharacterConverter(defaultCharacter));
converters.put(Character.class,