{"ast_node_type":"other","tokens":[{"end":20,"kind":"keyword","start":0,"text":"match"}]}
        match self {
    pub(crate) fn for_each_metavar<A>(&self, mut aux: A, mut cb: impl FnMut(A, &Ident) -> A) -> A {
            MetaVarExpr::Concat(elems) => {