Does `Mapper.mapNullable` not support nested `Map`...

# serialization

[ankushg]

Does Mapper.mapNullable not support nested `Map`s?

When I try to something like

@Serializable
data class Wrapper(val nested: Nested)

@Serializable
data class Nested(val string: String)

fun test() {
    val wrapper = Wrapper(Nested("test"))
    val mapped = Mapper.map(Wrapper.serializer(), wrapper)
}

I get a Map with the nested object flattened like

{
        "nested.string" -> "test"
    }

Instead, what I want is something like:

{ 
        "nested" -> { // another Map<String, Any?>
            "string" -> "test"
        }
    }