Workaround for traditional inheritance features in object-oriented languages

[tshort]

This is really getting to be a FAQ. Here’s another approach by Mike Innes with his @forward macro that helps with the bookkeeping of your option #2.

• Is there a Julian way to combine types generically or a design pattern that achieves the goal? - #9 by MikeInnes
• http://mikeinnes.github.io/2016/03/21/sorting.html