      def statusbar(self) -> "StatusBar":
          """ :class:`lib.gui.custom_widgets.StatusBar`: The GUI StatusBar
          :class:`tkinter.ttk.Frame`. """
          return self._gui_objects.status_bar
  
      @property
      def command_notebook(self) -> Optional["CommandNotebook"]:
 
</s> remove     def _available_masks(self) -> List[str]:
        """ list: The mask names that are available for every face in the alignments file """
        retval = [key
                  for key, val in self._samples.alignments.mask_summary.items()
                  if val == self._samples.alignments.faces_count]
        return retval
 </s> add     def config_tools(self) -> "ConfigTools":
        """ :class:`ConfigTools`: The object responsible for parsing configuration options and
        updating to/from the GUI """
        return self._config_tools

    @property
    def dispatcher(self) -> "Dispatcher":
        """ :class:`Dispatcher`: The object responsible for triggering events and variables and
        handling global GUI state """
        return self._dispatcher

    @property
    def display(self) -> FacesDisplay:
        """ :class:`~tools.preview.viewer.FacesDisplay`: The object that holds the sample,
        converted and patched faces """
        return self._display

    @property
    def lock(self) -> Lock:
        """ :class:`threading.Lock`: The threading lock object for the Preview GUI """
        return self._lock

    @property
    def progress_bar(self) -> "BusyProgressBar":
        """ :class:`~tools.preview.control_panels.BusyProgressBar`: The progress bar that indicates
        a swap/patch thread is running """
        assert self._cli_frame is not None
        return self._cli_frame.busy_progress_bar

    def update_display(self):
        """ Update the images in the canvas and redraw """
        if not hasattr(self, "_image_canvas"):  # On first call object not yet created
            return
        assert self._image_canvas is not None
        self._image_canvas.reload() </s> remove     @property
    def trigger(self) -> Event:
        """ :class:`threading.Event`: The trigger to indicate that a patching run should
        commence. """
        return self._trigger

 </s> add  </s> remove     def __init__(self, root: tk.Tk, cli_opts: "CliOptions", statusbar: "StatusBar") -> None:
 </s> add     def __init__(self,
                 root: tk.Tk,
                 cli_opts: Optional["CliOptions"],
                 statusbar: Optional["StatusBar"]) -> None:
        # This should only be None when a separate tool (not main GUI) is used, at which point
        # this statusbar does not exist
        assert self._gui_objects.status_bar is not None
      def statusbar(self) -> "StatusBar":
          """ :class:`lib.gui.custom_widgets.StatusBar`: The GUI StatusBar
          :class:`tkinter.ttk.Frame`. """
        # This should only be None when a separate tool (not main GUI) is used, at which point
        # this statusbar does not exist
        assert self._gui_objects.status_bar is not None
          return self._gui_objects.status_bar
  
      @property
      def command_notebook(self) -> Optional["CommandNotebook"]:
keep keep add keep keep keep keep
 bugfix:
    - preview tool - Prevent tkinter variables from exiting main thread
refactor:
    - preview tool - Split module to smaller sub-modules + docs, locales
Typing:
    - tools.preview.cli
Unit test:
    - tools.preview.viewer 
lib/gui/utils/config.py