{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"Ident::from_str_and_span(&format!(\"{prefix}_{i}\"),"}]}
        Ident::from_str_and_span(&format!("{prefix}_{i}"), self.span)
    fn mk_pattern_ident(&self, prefix: &str, i: usize) -> Ident {
    }