public static void OnOperationProgressChanged(InstallationManager installationManager, int progress)
        {
            EventHandler <int> handler = OperationProgressChanged;

            handler?.Invoke(installationManager, progress);
        }
        public static void OnTextToDisplayToOutputPaneReady(InstallationManager installationManager, string text)
        {
            EventHandler <string> handler = TextToDisplayToOutputPaneReady;

            handler?.Invoke(installationManager, text);
        }
        public static void OnOperationDescriptionChange(InstallationManager installationManager, string description)
        {
            EventHandler <string> handler = OperationDescriptionChanged;

            handler?.Invoke(installationManager, description);
        }