}
tip += ResourceManagerUtils.getPropertyNotNull(facesContext, "tobago", "sheetTipSorting");
markup = markup.add(Markup.SORTABLE);
SheetState sheetState = sheet.getSheetState(facesContext);
if (column.getId().equals(sheetState.getSortedColumnId())) {
String sortTitle;
if (sheetState.isAscending()) {
sorterImage = contextPath + resourceManager.getImage(facesContext, "image/ascending.gif");
sortTitle = ResourceManagerUtils.getPropertyNotNull(facesContext, "tobago", "sheetAscending");
markup = markup.add(Markup.ASCENDING);
} else {
sorterImage = contextPath + resourceManager.getImage(facesContext, "image/descending.gif");