Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/ThemeRecord.java
* @see org.eclipse.birt.report.model.activity.SimpleRecord#perform(boolean)
	 */
	protected void perform( boolean undo )
	{
		
		
		if ( undo )
		{
			module.setProperty( IModuleModel.THEME_PROP, oldTheme );
			updateStyles( newTheme );
		}
		else
		{
			module.setProperty( IModuleModel.THEME_PROP, newTheme );
			updateStyles( oldTheme );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.activity.AbstractElementRecord#getTarget()
	 */
	public DesignElement getTarget( )
	{
		return module;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.activity.AbstractElementRecord#getEvent()