{"ast_node_type":"other","tokens":[{"end":20,"kind":"keyword","start":0,"text":"#[subdiagnostic]"}]}
    #[subdiagnostic]
    pub(crate) sub_suggestion_label: Option<UnreachableLabelSubLabel>,
    pub(crate) sub_unreachable_label: Option<UnreachableLabelSubLabelUnreachable>,