<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _on_checkbox_toggled(self, renderer, path, config_m, config_list_store):
 """Callback method handling a config toggle event :param Gtk.CellRenderer renderer: Cell renderer that has been toggled :param path: Path within the list store :param ConfigModel config_m: The config model related to the toggle option :param Gtk.ListStore config_list_store: The list store related to the toggle option """

        config_key = config_list_store[int(path)][self.KEY_STORAGE_ID]
        config_value = bool(config_list_store[int(path)][self.TOGGLE_VALUE_STORAGE_ID])
        config_value ^= True
        config_m.set_preliminary_config_value(config_key, config_value)