How to use the pygubu.widgets.scrollbarhelper.ScrollbarHelper function in pygubu

def test_class(self):
        self.assertIsInstance(self.widget,
            pygubu.widgets.scrollbarhelper.ScrollbarHelper)
        self.widget.destroy()

def create_treeview_widget_list(self, treelist):
        # sbhelper widget
        sbhelper = ScrollbarHelper(self.widgetlist, scrolltype='both')

        # widgetlisttv widget
        widgetlisttv = ttk.Treeview(sbhelper)
        widgetlisttv.configure(selectmode='browse', show='tree')
        widgetlisttv.grid(column='0', row='0', sticky='nsew')
        
        sbhelper.add_child(widgetlisttv)
        sbhelper.configure(usemousewheel='true')
        sbhelper.grid(column='0', row='0', sticky='nsew')
        
        #Default widget image:
        default_image = ''
        try:
            default_image = StockImage.get('22x22-tk.default')
        except StockImageException as e:
            pass

def _create_ui(self):
        self._sbh = ScrollbarHelper(self)
        self._sbh.grid(row=0, column=0, sticky='we')
        self._text = text = tk.Text(self._sbh, width=20, height=3)
        self._sbh.add_child(self._text)
        self.rowconfigure(0, weight=1)
        self.columnconfigure(0, weight=1)
        text.bind('', self._on_variable_changed)