  At present there is only the :class:`~plugins.train.trainer.original` plugin, so that entirely
  inherits from this class. If further plugins are developed, then common code should be kept here,
  with "original" unique code split out to the original plugin.
  """
  
  import logging
  import os
  import sys
  import time
  from typing import Callable, cast, Dict, Generator, List, Optional, Tuple, TYPE_CHECKING, Union
 
</s> remove from typing import Callable, cast, Dict, Generator, List, Optional, Tuple, TYPE_CHECKING, Union
 </s> add import typing as T </s> remove from typing import Callable, cast, Dict, List, Optional, Tuple, TYPE_CHECKING, Union
 </s> add  </s> remove from typing import Any, Callable, ContextManager, Dict, List, Optional, TYPE_CHECKING, Union
 </s> add  </s> remove 
 </s> add from __future__ import annotations </s> remove from typing import Dict, List, Optional, Tuple, Union

 </s> add 
from __future__ import annotations
  At present there is only the :class:`~plugins.train.trainer.original` plugin, so that entirely
  inherits from this class. If further plugins are developed, then common code should be kept here,
  with "original" unique code split out to the original plugin.
  """
from __future__ import annotations
  import logging
  import os
  import sys
  import time
  from typing import Callable, cast, Dict, Generator, List, Optional, Tuple, TYPE_CHECKING, Union
keep keep keep keep replace keep keep keep keep keep
 Remove plaidML support (#1325)

* Remove PlaidML reference from readme files

* Remove AMD option from installers

* remove amd requirements and update setup.py

* remove plaidml test from CI workflow

* gpustats: remove plaidml backend

* plaid removals:
  - faceswap.py - python version check
  - setup.cfg - plaidml typing ignore
  - lib.keras_utils - All plaid code
  - lib.launcher.py - All plaidml checks and configuration

* remove tf2.2 specific code from GUI event reader

* lib.model - remove all plaidml implementations

* plugins.extract - remove plaidml code

* plugins.train remove plaidml code

* lib.convert - remove plaidml code

* tools.model: remove plaidml code

* Remove plaidML tests from unit tests

* remove plaidml_utils and docsting cleanups

* Remove plaidML refs from configs

* fix keras imports 
plugins/train/trainer/_base.py