obj
fun <T : SubDocument> obj( name: String?, factory: (DocSourceField) -> T, enabled: Boolean? = null, dynamic: Dynamic? = null, params: Params = Params()): SubDocument.UnboundSubDocument<T>
fun <T : SubDocument> obj( factory: (DocSourceField) -> T, enabled: Boolean? = null, dynamic: Dynamic? = null, params: Params = Params()): SubDocument.UnboundSubDocument<T>