Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
* <li>If the element name is not required, clear the name.
	 * </ul>
	 * 
	 * @param element
	 *            the element handle whose name is need to check.
	 */
	public void rename( DesignElement element )
	{
		if ( element == null )
			return;
		IElementDefn defn = element.getDefn( );
		if ( defn.getNameOption( ) == MetaDataConstants.REQUIRED_NAME
				|| element.getRoot( ) instanceof Library
				|| element.getName( ) != null )
			makeUniqueName( element );
		LevelContentIterator iter = new LevelContentIterator( this, element, 1 );
		while ( iter.hasNext( ) )
		{
			DesignElement innerElement = (DesignElement) iter.next( );
			rename( innerElement );
		}
	}
	/**
	 * Returns the version manager for the API compatibility.
	 * 
	 * @return the version manager
	 */
	public VersionControlMgr getVersionManager( )
	{
		return versionMgr;