Overiding parent ruleset in favour of grandparent
I'd like to override my parent ruleset in favor of the grandparent.
An example: ruleset B is the child of ruleset A and B uses different fonts. Extension (or ruleset) C is based on B but would rather use the fonts used by A.
It's my understanding that FG first reads A then superimposes any changes made by B and then again superimposes any changes made by C. So, how do I reference the grandparent ruleset? Is this documented somewhere?
Thanks,
Peter