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kotlinlang

Hi guys,
I'm seeking for some help with a stupid problem. I have some JSON data like this:
```{
		"time" : "2017-06-29T16:00:00.000000Z",
		"value" : : "foo"
	}```
And I'm trying to transform this using the libraries `jackson-kotlin-module` and `koda-time`.
My data class for this object looks like this:
```data class MyObject&lt;T&gt;(val time: DateTime, val value: String)```
I get an exception from jackson ```Caused by: com.fasterxml.jackson.databind.exc.MismatchedInputException: Can not construct instance of org.joda.time.DateTime (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('2017-06-01T00:00:00.000000Z')```

It works, if I change the type from `DateTime` to `String`. I thought jackson could automatically map this, or am I mistaken?