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
* @param name
	 *            name of the data set
	 * @return a handle to the data set, or <code>null</code> if the data set
	 *         is not found
	 */
	public DataSetHandle findDataSet( String name )
	{
		DesignElement element = module.findDataSet( name );
		if ( !( element instanceof DataSet ) )
			return null;
		return (DataSetHandle) element.getHandle( element.getRoot( ) );
	}
	/**
	 * Finds a joint data set by name in this module and the included modules.
	 * 
	 * @param name
	 *            name of the joint data set
	 * @return a handle to the joint data set, or <code>null</code> if the
	 *         data set is not found
	 */
	public JointDataSetHandle findJointDataSet( String name )
	{
		DesignElement element = module.findDataSet( name );
		if ( !( element instanceof JointDataSet ) )
			return null;
		return (JointDataSetHandle) element.getHandle( element.getRoot( ) );
	}
	/**
	 * Finds a template data set by name in this module and the included
	 * modules.