fLineNumberRulerColumn= new LineNumberRulerColumn();
if (getPreferenceStore().getBoolean(PreferenceConstants.LINE_NUMBER_RULER_QUICK_DIFF)) { LineNumberChangeRulerColumn column= new LineNumberChangeRulerColumn(); column.setHover(new JavaChangeHover()); fLineNumberRulerColumn= column; } else { fLineNumberRulerColumn= new LineNumberRulerColumn(); }
	protected IVerticalRulerColumn createLineNumberRulerColumn() {		fLineNumberRulerColumn= new LineNumberRulerColumn();		initializeLineNumberRulerColumn(fLineNumberRulerColumn);		return fLineNumberRulerColumn;	}