pub type AddConditionalFn = fn(&mut Sheet, MatchExpr, Vec<(Box<dyn Any>, Vec<RelationshipId>)>, Vec<RelationshipId>) -> Result<ConditionalId, Error>;Expand description
Calls Sheet::add_conditional with the appropriate concrete type.
Each branch carries a single boxed key value and the RelationshipIds active for that
branch. The default is a list of RelationshipIds active when no branch key matches.