Modern SmallTalks have the option to save off a hierarchy of classes to text in order to use modern version control, and also to apply these exports to a running image. This should be even easier for traditional languages with no live running environment. There's no reason whatever structure editor you use can't export a normalized text representation so that you can still use it with Git
> the option to save off a hierarchy of classes to text
And so did ancient Smalltalks.
1984 "Smalltalk-80 The Interactive Programming Environment" page 46
"Within each project, a set of changes you make to class descriptions is maintained. … Using a browser view of this set of changes, you can find out what you have been doing. Also, you can use the set of changes to create an external file containing descriptions of the modifications you have made to the system so that you can share your work with other users."
