classesBuilder.append(" ").append(
isFooter ? style.lastColumnFooter() : style.lastColumnHeader());
appendExtraStyles(prevHeader, classesBuilder);
// Render the last header.
TableCellBuilder th = tr.startTH().colSpan(prevColspan).className(classesBuilder.toString());
enableColumnHandlers(th, column);
if (prevHeader != null) {
Context context = new Context(0, curColumn - prevColspan, prevHeader.getKey());
renderSortableHeader(th, context, prevHeader, isSorted, isSortAscending);
}