Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
* @throws SemanticException
	 *             if the name is empty or the same name exists.
	 * 
	 */
	public void addConfigVariable( ConfigVariable configVar )
			throws SemanticException
	{
		ElementPropertyDefn propDefn = module
				.getPropertyDefn( CONFIG_VARS_PROP );
		if ( configVar != null && StringUtil.isBlank( configVar.getName( ) ) )
		{
			throw new PropertyValueException( getElement( ), propDefn,
					configVar,
					PropertyValueException.DESIGN_EXCEPTION_INVALID_VALUE );
		}
		if ( configVar != null
				&& findConfigVariable( configVar.getName( ) ) != null )
		{
			throw new PropertyValueException( getElement( ), propDefn,
					configVar.getName( ),
					PropertyValueException.DESIGN_EXCEPTION_VALUE_EXISTS );
		}
		ComplexPropertyCommand cmd = new ComplexPropertyCommand( getModule( ),
				getElement( ) );
		cmd.addItem( new CachedMemberRef( propDefn ), configVar );
	}
	/**
	 * Adds a new embedded image.
	 * 
	 * @param image