{"ast_node_type":"other","tokens":[{"end":19,"kind":"keyword","start":0,"text":".collect();"}]}
        .collect();
        .flat_map(|v| v.ast().fields.iter().filter_map(|f| f.ident.as_ref().map(|i| i.to_string())))
    // tidy errors on `#[test]` outside of test files, so we use `#[test ]` to work around this