String img = resourceManager.getImage(viewRoot, "image/unsorted.gif", true);
String imageUnsorted = image1x1;
if (img != null) {
imageUnsorted = contextPath + img;
}
writer.startElement(HtmlConstants.DIV, null);
writer.writeIdAttribute(sheetId + "_header_div");
writer.writeClassAttribute("tobago-simpleSheet-header");
for (UIColumn column : renderedColumnList) {
renderColumnHeader(facesContext, writer, data, columnCount, column,
imageAscending, imageDescending, imageUnsorted, image1x1, sortMarkerWidth, false);