Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/util/ModelUtil.java
IOdaExtendableElementModel.EXTENSION_ID_PROP, extensionId );
		}
		else
		if ( source instanceof IExtendedItemModel )
		{
			String extensionId = (String) source.getProperty( sourceModule,
					IExtendedItemModel.EXTENSION_NAME_PROP );
			destination.setProperty( IExtendedItemModel.EXTENSION_NAME_PROP,
					extensionId );
		}
		else
		{
			assert false;
		}
	}
	/**
	 * Clone the structure list, a list value contains a list of
	 * <code>IStructure</code>.
	 * 
	 * @param list
	 *            The structure list to be cloned.
	 * @return The cloned structure list.
	 */
	private static ArrayList cloneStructList( List list )
	{
		if ( list == null )
			return null;
		ArrayList returnList = new ArrayList( );
		for ( int i = 0; i < list.size( ); i++ )
		{