{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"(ConfusionType::Both,"}]}
            (ConfusionType::Both, _) | (_, ConfusionType::Both) => ConfusionType::Both,
            (this, ConfusionType::None) => this,
            (ConfusionType::Case, ConfusionType::DigitLetter)