Incorrect deserialization of cause of Throwable

Right now after deserialization of exception the cause of exception is always an instance of throwable and it does not depend on enable/disable default typying.
Here is a test case:
@Test
public void testCauseConcreteType() throws JsonProcessingException, IOException

{ ObjectMapper mapper = new ObjectMapper(); RuntimeException aa = new RuntimeException("AAA", new IllegalAccessException("BBB")); RuntimeException bb = mapper.readValue(mapper.writeValueAsString(aa), RuntimeException.class); Assert.assertEquals(aa.getCause().getClass(), bb.getCause().getClass()); }

It would be nice to have an option to register class and way of writing type information programmatically, same way as one can register Sub Types.