code: public final <S, T> void registerMarshaller(ConverterKey<S,T> key, ToMarshaller<S, T> converter) {
  		registerConverter(key, new ToMarshallerConverter<S,T>(converter));
  	}
docs: Register a Marshaller with the given source and target class.
  The marshaller is used as follows: Instances of the source can be marshalled into the target class.
  @param key Converter Key to use
  @param converter The ToMarshaller to be registered