setProperty( ImageItem.VALUE_EXPR_PROP, value );
setProperty( IImageItemModel.VALUE_EXPR_PROP, value );
	public void setValueExpression( String value ) throws SemanticException	{		try		{			module.getActivityStack( ).startTrans( );			setProperty( ImageItem.SOURCE_PROP,					DesignChoiceConstants.IMAGE_REF_TYPE_EXPR );			setProperty( ImageItem.VALUE_EXPR_PROP, value );		}		catch ( SemanticException e )		{			module.getActivityStack( ).rollback( );			throw e;		}		module.getActivityStack( ).commit( );	}