{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"StatementKind::SetDiscriminant"}]}
            StatementKind::SetDiscriminant { box place, variant_index } => {
            // we have an opportunity if `variant_index ?= A`.
                let Some(discr_target) = self.map.find_discr(place.as_ref()) else { return };