{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"DefKind::Ctor(CtorOf::Variant,"}]}
            DefKind::Ctor(CtorOf::Variant, ..) | DefKind::Variant => {
            // Case 2. Reference to a variant constructor.
                let (generics_def_id, index) = if let Some(self_ty) = self_ty {