def METHOD_NAME(self, **kwargs):
    # print("_voices_callback args: {}".format(kwargs))
    self.voices_dict = kwargs
    voice_options = kwargs.keys()
    # Show the voice options sorted alphabetically
    voice_options = sorted(voice_options)
    # Sometimes we get an empty list, then do nothing, we will try later again
    if voice_options:
        self.container.remove_child(self.voices_dropdown)
        self.voices_dropdown = gui.DropDown.new_from_list(voice_options,
                                                width=200, height=20, margin='10px')
        self.voices_dropdown.onchange.do(self._drop_down_changed)
        self.container.append(self.voices_dropdown)
        self.voices_dropdown.select_by_value("English_(Great_Britain)")