{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"Missing"}]}
            Missing | Wild | Never | Expr(_) | Range(..) | Binding(.., None) | Err(_) => {}
        match self.kind {
            Box(s) | Deref(s) | Ref(s, _) | Binding(.., Some(s)) | Guard(s, _) => s.walk_(it),