/// <summary>
        /// Initialization of the package; this method is called right after the package is sited, so this is the place
        /// where you can put all the initialization code that rely on services provided by VisualStudio.
        /// </summary>
        protected override void Initialize()
        {
            Instance = this;

            base.Initialize();

            ExpressionLoader.Initialize(this);

            GeometryWatchCommand.Initialize(this);
            GraphicalWatchCommand.Initialize(this);
            PlotWatchCommand.Initialize(this);
        }
        /// <summary>
        /// Initializes the singleton instance of the command.
        /// </summary>
        /// <param name="package">Owner package, not null.</param>
        public static void Initialize(GraphicalWatchPackage package)
        {
            OleMenuCommandService commandService = package.GetService(typeof(IMenuCommandService)) as OleMenuCommandService;

            Instance = new PlotWatchCommand(package, commandService);
        }