Is there an alternative to "extend" for item and recipe groups?

[Amarin_Reyny]

Last time I checked, it doesn’t work, and I’m not the only one to have noticed this.

Does "copy-from" and "extend" work on item groups?

I found a different solution later to what I wanted to do without copy-from and extend, but since you asked I tried it with copy-from/extend and copy-from/extend do not appear to work on item groups.

As for recipe groups, I tried using it as it as a way of adding to crafting recipes at basecamps as recently as this morning, but it doesn’t do anything in-game, even as it otherwise runs without giving any error messages.