Bug 160176 Create design by a template
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignSession.java
* 
	 * @return The new report design.
	 */
	public ReportDesign createDesign( )
	{
		return createDesign( null );
	}
	/**
	 * Creates a new library.
	 * 
	 * @return the created library.
	 */
	public Library createLibrary( )
	{
		Library library = new Library( this );
		Theme theme = new Theme( ModelMessages
				.getMessage( Theme.DEFAULT_THEME_NAME ) );
		library.setProperty( IModuleModel.THEME_PROP, new ElementRefValue(
				null, theme ) );
		ModelUtil.insertCompatibleThemeToLibrary( library, theme );
		
		theme.setID( library.getNextID( ) );
		library.addElementID( theme );
		library.setValid( true );
		libraries.add( library );
		return library;
	}
	/**
	 * Returns an iterator over the open designs.
	 *