{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"self.storage.duplicate_entries.push((key,"}]}
        self.storage.duplicate_entries.push((key, hidden_type));
    pub fn add_duplicate(&mut self, key: OpaqueTypeKey<'tcx>, hidden_type: OpaqueHiddenType<'tcx>) {
        self.undo_log.push(UndoLog::DuplicateOpaqueType);