Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
Long idObj = new Long( element.getID( ) );
		assert !idMap.containsKey( idObj );
		idMap.put( idObj, element );
		
		long id = element.getID( );
		if ( this.elementIDCounter <= id )
		{
			this.elementIDCounter = id + 1;
		}
	}
	/**
	 * Adds an id number to the map.
	 * 
	 * @param id
	 *            the id to add
	 */
	public void addElementID( long id )
	{
		if ( this.elementIDCounter <= id )
		{
			this.elementIDCounter = id + 1;
		}
	}
	/**
	 * Drops an element from the id-to-element map. Does nothing if IDs are not
	 * enabled. Should be called only from the
	 * {@link org.eclipse.birt.report.model.command.ContentCommand ContentCommand}.
	 * 
	 * @param element
	 *            The old element to remove.