{"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"let"}]}
    let name = cx.expr_match(span, cx.expr_self(span), arms);
        .collect::<ThinVec<_>>();
    let fn_path_write_str = cx.std_path(&[sym::fmt, sym::Formatter, sym::write_str]);