row.addCell(new TableCell("d'dd"));
row.addCell(new TableCell(222));
row.addCell(new TableCell(false));
rows.add(row);
testData.addRows(rows);
JsonRenderer r = new JsonpRenderer();
assertEquals(
"{\"cols\":[{\"id\":\"A\",\"label\":\"col0\",\"type\":\"string\",\"pattern\":\"\"},"
+ "{\"id\":\"B\",\"label\":\"col1\",\"type\":\"number\",\"pattern\":\"\"},"