json4s

class CustomSerializerWithTypeHints[T, JV <: JValue] extends CustomSubTypesSerializer[T, JObject]
class CustomSubTypesSerializer[T, JV <: JValue] extends org.json4s.Serializer[T]

With contrary to org.json4s.CustomSerializer it has symmetric behaviour: if partial function for deserialization is not defined in values, serialization will be chained instead of Exception throwing.
With contrary to org.json4s.CustomSerializer it has symmetric behaviour: if partial function for deserialization is not defined in values, serialization will be chained instead of Exception throwing. Also it handles subtypes - not only direct instances of T
class Json4sDeserializer[Msg] extends Deserializer[Msg]
class Json4sSerializer[Msg <: AnyRef] extends Serializer[Msg]

object AllTypeHints extends TypeHints
object CommonFormats
object ExceptionClassHavingConstructorWithMessageAndCause
object ExceptionClassHavingConstructorWithMessageOnly
object ExceptionInstanceHavingConstructorWithMessageAndCause
object ExceptionInstanceHavingConstructorWithMessageOnly
object ExceptionSerializer extends org.json4s.Serializer[Throwable]
object IndexedSeqSerializer extends org.json4s.Serializer[IndexedSeq[_]]
object ObjectSerializer extends org.json4s.Serializer[Any]
implicit def deserializer[Msg](implicit formats: Formats): Deserializer[Msg]
implicit def serializer[Msg <: AnyRef](implicit formats: Formats): Serializer[Msg]