message: Add panelbase.getType() function for json schema generation.
diff: @@ -123,6 +123,9 @@ export class PanelModelBase extends SurveyElement
  this.createLocalizableString("description", this, true);
  this.createLocalizableString("requiredErrorText", this);
  }
  + public getType(): string {
  + return "panelbase";
  + }
  public setSurveyImpl(value: ISurveyImpl) {
  super.setSurveyImpl(value);
  if (this.isDesignMode) this.onVisibleChanged();
  