  _CONFIG: Optional["Config"] = None
  
  
  def initialize_config(root: tk.Tk,
                        cli_opts: Optional["CliOptions"],
                        statusbar: Optional["StatusBar"]) -> Optional["Config"]:
      """ Initialize the GUI Master :class:`Config` and add to global constant.
  
      This should only be called once on first GUI startup. Future access to :class:`Config`
      should only be executed through :func:`get_config`.
  
 
</s> remove _CONFIG: Optional["Config"] = None
 </s> add _CONFIG: Config | None = None </s> remove                  cli_opts: Optional["CliOptions"],
                 statusbar: Optional["StatusBar"]) -> None:
 </s> add                  cli_opts: CliOptions | None,
                 statusbar: StatusBar | None) -> None: </s> remove     def cli_opts(self) -> "CliOptions":
 </s> add     def cli_opts(self) -> CliOptions: </s> remove     def statusbar(self) -> "StatusBar":
 </s> add     def statusbar(self) -> StatusBar: </s> remove 
_IMAGES: Optional["Images"] = None
_PREVIEW_TRIGGER: Optional["PreviewTrigger"] = None
 </s> add _IMAGES: "Images" | None = None
_PREVIEW_TRIGGER: "PreviewTrigger" | None = None
                      cli_opts: CliOptions | None,
                      statusbar: StatusBar | None) -> Config | None:
  _CONFIG: Optional["Config"] = None
  
  
  def initialize_config(root: tk.Tk,
                      cli_opts: CliOptions | None,
                      statusbar: StatusBar | None) -> Config | None:
                      cli_opts: CliOptions | None,
                      statusbar: StatusBar | None) -> Config | None:
      """ Initialize the GUI Master :class:`Config` and add to global constant.
  
      This should only be called once on first GUI startup. Future access to :class:`Config`
      should only be executed through :func:`get_config`.
  
keep keep keep keep replace replace keep keep keep keep keep
 Rebase code (#1326)

* Remove tensorflow_probability requirement

* setup.py - fix progress bars

* requirements.txt: Remove pre python 3.9 packages

* update apple requirements.txt

* update INSTALL.md

* Remove python<3.9 code

* setup.py - fix Windows Installer

* typing: python3.9 compliant

* Update pytest and readthedocs python versions

* typing fixes

* Python Version updates
  - Reduce max version to 3.10
  - Default to 3.10 in installers
  - Remove incompatible 3.11 tests

* Update dependencies

* Downgrade imageio dep for Windows

* typing: merge optional unions and fixes

* Updates
  - min python version 3.10
  - typing to python 3.10 spec
  - remove pre-tf2.10 code
  - Add conda tests

* train: re-enable optimizer saving

* Update dockerfiles

* Update setup.py
  - Apple Conda deps to setup.py
  - Better Cuda + dependency handling

* bugfix: Patch logging to prevent Autograph errors

* Update dockerfiles

* Setup.py - Setup.py - stdout to utf-8

* Add more OSes to github Actions

* suppress mac-os end to end test 
lib/gui/utils/config.py