{"ast_node_type":"struct","tokens":[{"end":100,"kind":"keyword","start":0,"text":"DefKind::Ctor(CtorOf::Variant,"}]}
                    DefKind::Ctor(CtorOf::Variant, _) => "construct this tuple variant".to_string(),
                    DefKind::Ctor(CtorOf::Struct, _) => "construct this tuple struct".to_string(),
                    kind => format!("call this {}", self.tcx.def_kind_descr(kind, def_id)),