ModelUtil.insertCompatibleThemeToLibrary( library, theme );    theme.setID( library.getNextID( ) ); library.addElementID( theme );
	public Library createLibrary( )	{		Library library = new Library( this );		Theme theme = new Theme( ModelMessages				.getMessage( Theme.DEFAULT_THEME_NAME ) );		library.getSlot( ILibraryModel.THEMES_SLOT ).add( theme );		library.setProperty( Module.THEME_PROP, new ElementRefValue( null,				theme ) );		library.setValid( true );		libraries.add( library );		return library;	}