How to use the gooey.gui.util.wx_util.horizontal_rule function in Gooey

def layoutComponent(self):
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.header, 0, wx.EXPAND)
        sizer.Add(wx_util.horizontal_rule(self), 0, wx.EXPAND)

        sizer.Add(self.navbar, 1, wx.EXPAND)
        sizer.Add(self.console, 1, wx.EXPAND)
        sizer.Add(wx_util.horizontal_rule(self), 0, wx.EXPAND)
        sizer.Add(self.footer, 0, wx.EXPAND)
        self.SetMinSize((400, 300))
        self.SetSize(self.buildSpec['default_size'])
        self.SetSizer(sizer)
        self.console.Hide()
        self.Layout()
        # Program Icon (Windows)
        icon = wx.Icon(self.buildSpec['images']['programIcon'], wx.BITMAP_TYPE_PNG)
        self.SetIcon(icon)
        if sys.platform != 'win32':
            # OSX needs to have its taskbar icon explicitly set
            # bizarrely, wx requires the TaskBarIcon to be attached to the Frame

def layoutComponent(self):
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.header, 0, wx.EXPAND)
        sizer.Add(wx_util.horizontal_rule(self), 0, wx.EXPAND)

        sizer.Add(self.navbar, 1, wx.EXPAND)
        sizer.Add(self.console, 1, wx.EXPAND)
        sizer.Add(wx_util.horizontal_rule(self), 0, wx.EXPAND)
        sizer.Add(self.footer, 0, wx.EXPAND)
        self.SetMinSize((400, 300))
        self.SetSize(self.buildSpec['default_size'])
        self.SetSizer(sizer)
        self.console.Hide()
        self.Layout()
        # Program Icon (Windows)
        icon = wx.Icon(self.buildSpec['images']['programIcon'], wx.BITMAP_TYPE_PNG)
        self.SetIcon(icon)
        if sys.platform != 'win32':
            # OSX needs to have its taskbar icon explicitly set
            # bizarrely, wx requires the TaskBarIcon to be attached to the Frame
            # as instance data (self.). Otherwise, it will not render correctly.
            self.taskbarIcon = TaskBarIcon(iconType=wx.adv.TBI_DOCK)
            self.taskbarIcon.SetIcon(icon)

def _do_layout(self):
    sizer = wx.BoxSizer(wx.VERTICAL)
    sizer.Add(self.head_panel, 0, wx.EXPAND)
    sizer.Add(wx_util.horizontal_rule(self), 0, wx.EXPAND)

    if self.build_spec['layout_type'] == 'column':
      self.config_panel = layouts.ColumnLayout(self, build_spec=self.build_spec)
      sizer.Add(self.config_panel, 1, wx.EXPAND)
    else:
      self.config_panel = layouts.FlatLayout(self, build_spec=self.build_spec)
      sizer.Add(self.config_panel, 1, wx.EXPAND)

    sizer.Add(self.runtime_display, 1, wx.EXPAND)

    self.runtime_display.Hide()
    sizer.Add(wx_util.horizontal_rule(self), 0, wx.EXPAND)
    sizer.Add(self.foot_panel, 0, wx.EXPAND)
    self.SetSizer(sizer)

    self.sizer = sizer

def _do_layout(self):
    sizer = wx.BoxSizer(wx.VERTICAL)
    sizer.Add(self.head_panel, 0, wx.EXPAND)
    sizer.Add(wx_util.horizontal_rule(self), 0, wx.EXPAND)

    if self.layout_type == layouts.COLUMN:
      self.config_panel = layouts.ColumnLayout(self)
    else:
      self.config_panel = layouts.FlatLayout(self)

    sizer.Add(self.config_panel, 1, wx.EXPAND)

    sizer.Add(self.runtime_display, 1, wx.EXPAND)

    self.runtime_display.Hide()
    sizer.Add(wx_util.horizontal_rule(self), 0, wx.EXPAND)
    sizer.Add(self.foot_panel, 0, wx.EXPAND)
    self.SetSizer(sizer)

    self.sizer = sizer

groupName = wx_util.h1(parent, self.getName(group) or '')
                groupName.SetForegroundColour(getin(group, ['options', 'label_color']))
                boxSizer.Add(groupName, 0, wx.TOP | wx.BOTTOM | wx.LEFT, 8)

        group_description = getin(group, ['description'])
        if group_description:
            description = AutoWrappedStaticText(parent, label=group_description, target=boxSizer)
            description.SetForegroundColour(getin(group, ['options', 'description_color']))
            description.SetMinSize((0, -1))
            boxSizer.Add(description, 1,  wx.EXPAND | wx.LEFT | wx.RIGHT | wx.BOTTOM, 10)

        # apply an underline when a grouping border is not specified
        # unless the user specifically requests not to show it
        if not getin(group, ['options', 'show_border'], False) and group['name'] \
                and getin(group, ['options', 'show_underline'], True):
            boxSizer.Add(wx_util.horizontal_rule(parent), 0, wx.EXPAND | wx.LEFT, 10)

        ui_groups = self.chunkWidgets(group)

        for uigroup in ui_groups:
            sizer = wx.BoxSizer(wx.HORIZONTAL)
            for item in uigroup:
                widget = self.reifyWidget(parent, item)
                # !Mutate the reifiedWidgets instance variable in place
                self.reifiedWidgets.append(widget)
                sizer.Add(widget, 1, wx.ALL | wx.EXPAND, 5)
            boxSizer.Add(sizer, 0, wx.ALL | wx.EXPAND, 5)

        # apply the same layout rules recursively for subgroups
        hs = wx.BoxSizer(wx.HORIZONTAL)
        for e, subgroup in enumerate(group['groups']):
            self.makeGroup(parent, hs, subgroup, 1, wx.EXPAND)

if self.widgets.required_args:
      container.Add(wx_util.h1(self, i18n._("required_args_msg")), 0, wx.LEFT | wx.RIGHT, PADDING)
      container.AddSpacer(5)
      container.Add(wx_util.horizontal_rule(self), *STD_LAYOUT)
      container.AddSpacer(20)

      self.CreateComponentGrid(container, self.widgets.required_args, cols=self._num_req_cols)

      container.AddSpacer(10)

    if self.widgets.optional_args:
      # container.AddSpacer(10)
      container.Add(wx_util.h1(self, i18n._("optional_args_msg")), 0, wx.LEFT | wx.RIGHT, PADDING)
      container.AddSpacer(5)
      container.Add(wx_util.horizontal_rule(self), *STD_LAYOUT)
      container.AddSpacer(20)

      self.CreateComponentGrid(container, self.widgets.optional_args, cols=self._num_opt_cols)

    self.SetSizer(container)

def layout(self, num_columns):
    STD_LAYOUT = (0, wx.LEFT | wx.RIGHT | wx.EXPAND, PADDING)

    if self.title:
      self.container.Add(wx_util.h0(self, self.title), 0, wx.LEFT | wx.RIGHT, PADDING)
      self.container.AddSpacer(30)

    if self.widgets:
      self.container.Add(wx_util.h1(self, self.section_name), 0, wx.LEFT | wx.RIGHT, PADDING)
      self.container.AddSpacer(5)
      self.container.Add(wx_util.horizontal_rule(self), *STD_LAYOUT)
      self.container.AddSpacer(20)
      self.create_component_grid(self.container, self.widgets, cols=num_columns)
      self.container.AddSpacer(10)