dialog.setExpressionProvier( new ExpressionProvider( dataSetList ) );
dialog.setExpressionProvier( new ExpressionProvider( itemHandle ) );
	protected Object openDialogBox( Control cellEditorWindow )	{		String oldValue = (String) getValue( );		ExpressionBuilder dialog = new ExpressionBuilder( cellEditorWindow.getShell( ),				oldValue );		dialog.setExpressionProvier( new ExpressionProvider( dataSetList ) );		if ( dialog.open( ) == Dialog.OK )		{			String newValue = dialog.getResult( );			if ( !newValue.equals( oldValue ) )			{				return newValue;			}		}		return null;	}