/// <summary>
        /// Initializes the singleton instance of the command.
        /// </summary>
        /// <param name="package">Owner package, not null.</param>
        public static async Task InitializeAsync(LumiereObjectCreatorPackage package)
        {
            // Switch to the main thread - the call to AddCommand in CreateLumiereObject's constructor requires
            // the UI thread.
            await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync(package.DisposalToken);

            var options = (Options)package.GetDialogPage(typeof(Options));
            OleMenuCommandService commandService = await package.GetServiceAsync(typeof(IMenuCommandService)) as OleMenuCommandService;

            Instance = new CreateLumiereObject(package, commandService, options);
        }
        /// <summary>
        /// Initializes a new instance of the <see cref="CreateLumiereObject"/> class.
        /// Adds our command handlers for menu (commands must exist in the command table file)
        /// </summary>
        /// <param name="package">Owner package, not null.</param>
        /// <param name="commandService">Command service to add command to, not null.</param>
        private CreateLumiereObject(LumiereObjectCreatorPackage package, OleMenuCommandService commandService, Options options)
        {
            this.options   = options;
            this.package   = package ?? throw new ArgumentNullException(nameof(package));
            commandService = commandService ?? throw new ArgumentNullException(nameof(commandService));

            var menuCommandID = new CommandID(CommandSet, CommandId);
            var menuItem      = new MenuCommand(this.Execute, menuCommandID);

            commandService.AddCommand(menuItem);
        }