public int getColumnWidth(final int index) {
   return columnDefinitions.getWidth(index);
 }
 public int getColumnWidth(final int startIndex, final int endIndex) {
   return columnDefinitions.getWidth(startIndex, endIndex);
 }
 private void addSpanDefinition(final int startIndex, final int endIndex, final String name) {
   columnDefinitions.addSpan(startIndex, endIndex, name);
 }
 private int getColumnIndex(final String name) {
   return columnDefinitions.getIndex(name);
 }
 private void addColumnDefinition(final int index, final String name, final String width) {
   columnDefinitions.addColumn(index, name, width);
 }