return new HtmlText(slotLabel);
return new HtmlText(slotLabel, false);
        protected HtmlComponent getHeaderComponent(int columnIndex) {            if (columnIndex == 0 && isCheckable()) {                return new HtmlText();            }            else if (columnIndex < getNumberOfColumns() - getNumberOfLinks()) {                String slotLabel = getLabel(columnIndex);                return new HtmlText(slotLabel);            }            else {                return new HtmlText();            }        }