*/
public void addVerticalRulerColumn(IVerticalRulerColumn column) {
IVerticalRuler ruler= getVerticalRuler();
if (ruler instanceof CompositeRuler) {
CompositeRuler compositeRuler= (CompositeRuler) ruler;
compositeRuler.addDecorator(99, column);
}
}
/**
* Removes the give column from this viewer's vertical ruler.