Describe the notify method (#7335)

* Describe the `notify` method

* Add an illustration

src/survey.ts

@@ -1178,6 +1178,8 @@ export class SurveyModel extends SurveyElementCore
    *
    * - `"advanced"`\
    * An advanced header view applies the same properties as the basic view, plus [header settings](https://surveyjs.io/form-library/documentation/api-reference/iheader) from the [survey theme](https://surveyjs.io/form-library/documentation/api-reference/itheme#header). The advanced view features a more flexible header layout, a capability to specify a background image, and other settings that give a more professional look to the survey header.
+   *
+   * [View Demo](https://surveyjs.io/form-library/examples/brand-your-survey-header/ (linkStyle))
    */
   @property({
     onSet: (newValue, target: SurveyModel) => {
@@ -3291,6 +3293,16 @@ export class SurveyModel extends SurveyElementCore
       this.notify(this.completedStateText, this.completedState, value === "error");
     }
   }
+  /**
+   * Displays a toast notification with a specified message.
+   *
+   * Depending on the `type` argument, a survey can display the following notification types:
+   *
+   * ![Toast notification types in SurveyJS Form Library](https://surveyjs.io//Content/Images/docs/notification-types.png)
+   * @param message A message to display.
+   * @param type A notification type: `"info"` (default), `"success"`, or `"error"`.
+   * @param showActions For internal use.
+   */
   public notify(message: string, type: string, showActions: boolean = false): void {
     this.notifier.showActions = showActions;
     this.notifier.notify(message, type, showActions);