Extend the existing Codec interface, so it also contains an encoder function, which allows creating a Genotype from an existing decoded value T. This is done by introducing an Encoding interfaces.

public interface InvertibleCodec<T, G extends Gene<?, G>> extends Codec<T, G> {
	public Function<T, Genotype<G>> encoder();
	public default Genotype<G> encode(final T value) {
		return encoder().apply(value);
	}
}

All predefined Codec classes in the Codecs class should then return instances of the Encodec interface.