Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/util/ModelUtil.java
*/
	private static Object clonePropertyList( List value )
	{
		if ( value == null )
			return null;
		ArrayList returnList = new ArrayList( );
		for ( int i = 0; i < value.size( ); i++ )
		{
			Object item = value.get( i );
			if ( item instanceof ElementRefValue )
			{
				returnList.add( ( (ElementRefValue) item ).copy( ) );
			}
			else
			{
				returnList.add( item );
			}
		}
		return returnList;
	}
	/**
	 * Copies a list of design elements.
	 * 
	 * @param value
	 *            the value to copy
	 * @return the cloned list of design elements
	 */
	private static List cloneElementList( List value )
	{
		if ( value == null )