super(parent);
super(parent, elementRenderer);  setSize(50, 15); setAllowDuplicates(false);
	public TwoPaneElementSelector(Shell parent, ILabelProvider elementRenderer, 		ILabelProvider qualifierRenderer)	{		super(parent);				setMessage(""); //$NON-NLS-1$				fElementRenderer= elementRenderer;		fQualifierRenderer= qualifierRenderer;		}			