{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"CfgExpr::Invalid"}]}
        CfgExpr::Invalid | CfgExpr::Atom(_) | CfgExpr::Not(_) => expr,
    match expr {
        CfgExpr::Any(e) => flatten(CfgExpr::Any(e.into_vec().into_iter().map(make_dnf).collect())),