class TestT {

    @Test
    fun shouldDeserializeWithMissingField() {
        val objectMapper = ObjectMapper()
                .registerModule(KotlinModule())

        val readValue = objectMapper.readValue("{\"first\" : \"hi\" }", TestClass::class.java)

        assertEquals("hi", readValue.first)
        assertNull(readValue.second)
        assertNull(readValue.map)
    }

}


data class TestClass(
        val first: String,
        val second: String?,
        val map: Map<String, String>?
)