not able to access "AppWindow class" variable and functions from "@classmethod label_font_change_newversion"

[sudipshil9862]

error was: self.fontversion_checkbox.get_active() cannot found fontversion_checkbox

    @classmethod
    def label_font_change_newversion(
            self, dialogButton, _param_spec: Any, label: Gtk.Label) -> None:
        global FONTSIZE
        pango_font_description = dialogButton.get_font_desc()
        pango_font_description.set_size(int(FONTSIZE) * Pango.SCALE)
        pango_attr_font_description = Pango.AttrFontDesc.new(pango_font_description)
        pango_attr_list = Pango.AttrList.new()
        pango_attr_list.insert(attr=pango_attr_font_description)
        label.set_attributes(attrs=pango_attr_list)
        print(self.fontversion_checkbox.get_active()) #for testing

[sudipshil9862]

It seems the fontversion_checkbox is not defined at the class level, but rather at the instance level within the init method. so I'm gonna Keep the label_font_change_newversion method as an instance method

[sudipshil9862]

removing @ classmethod