*/
protected IVerticalRulerColumn createLineNumberRulerColumn() {
/*
* Left for compatibility. See LineNumberColumn.
*/
fLineNumberRulerColumn= new LineNumberChangeRulerColumn(getSharedColors());
((IChangeRulerColumn) fLineNumberRulerColumn).setHover(createChangeHover());
initializeLineNumberRulerColumn(fLineNumberRulerColumn);
return fLineNumberRulerColumn;
}