docs: public void addComponents(BaseApplet applet)
      {
          super.addComponents(applet);
          
          this.add(this.createComponentButton(ProductConstants.TOUR, applet));
          this.add(this.createComponentButton(ProductConstants.AIR, applet));
          this.add(this.createComponentButton(ProductConstants.HOTEL, applet));
          this.add(this.createComponentButton(ProductConstants.LAND, applet));
          this.add(this.createComponentButton(ProductConstants.TRANSPORTATION, applet));
          this.add(this.createComponentButton(ProductConstants.CAR, applet));
          this.add(this.createComponentButton(ProductConstants.CRUISE, applet));
          this.add(this.createComponentButton(ProductConstants.ITEM, applet));
      }