{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
            let wide_lin_col = line_index.to_wide(enc, lin_col).unwrap();
        for (enc, col) in [(WideEncoding::Utf16, col_utf16), (WideEncoding::Utf32, col_utf32)] {
            let got_lin_col = line_index.to_utf8(enc, wide_lin_col).unwrap();