{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"ty::Adt(def,"}]}
        ty::Adt(def, _) => (def.did(), def.non_enum_variant()),
    let (union_def_id, variant_def) = match union_type.kind() {
        _ => bug!("build_union_type_di_node on a non-ADT"),