Bug 145724 Change version after auto convert
By the request of 136536, user get warning message to confirm the auto convert. If user select yes, the file convert to newest format, but the version is still old. If user open this file again, he'll get the warning message even the file converted.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
*            an <code>int</code> value, which should be the one defined
	 *            in <code>IVisibleLevelControl</code>.
	 * 
	 * @return theme handles according the input level
	 */
	public List getVisibleThemes( int level )
	{
		List elementList = module.getModuleNameSpace( Module.THEME_NAME_SPACE )
				.getElements( level );
		return generateHandleList( elementList );
	}
	/**
	 * Returns all data source handles that this modules and the included
	 * modules contain.
	 * 
	 * @return all data source handles that this modules and the included
	 *         modules contain.
	 */
	public List getAllDataSources( )
	{
		IModuleNameSpace namescope = module
				.getModuleNameSpace( Module.DATA_SOURCE_NAME_SPACE );
		List elementList = namescope
				.getElements( IModuleNameSpace.ARBITARY_LEVEL );
		return generateHandleList( elementList );
	}
	/**
	 * Returns data source handles that are visible to this modules.
	 * 
	 * @return data source handles that are visible to this modules.