{"ast_node_type":"function","tokens":[{"end":66,"kind":"keyword","start":0,"text":"format_to_acc!(acc,"}]}
        format_to_acc!(acc, "//- /src/m{i}.rs\nfn foo() {{}}\n\n")
    let libs: String = (0..10).fold(String::new(), |mut acc, i| {
    });