Feature request: Allow selecting which constructor to make a codec for

[gigaherz]

If I understand correctly, Codec Builder looks for a constructor, and then looks for fields/getters matching that constructor. However if the class also has an empty constructor, it will generate a unit codec instead.
It would be nice if there was a way to select which constructor it should use for making the codec. Some popup or something, similar to the "generate override" dialog? Maybe asking for too much. :P