  from typing import cast, Dict, List, Optional, Sequence, Tuple
  
  import numpy as np
  from PIL import Image, ImageDraw, ImageTk
  
  from lib.training.preview_cv import PreviewBuffer
  
 
</s> remove from typing import cast, Dict, List, Optional, Sequence, Tuple, Union
 </s> add from typing import cast, Dict, List, Optional, Sequence, Tuple </s> remove from typing import cast, Dict, Optional, Tuple, TYPE_CHECKING
 </s> add from typing import Dict, Optional, Tuple

from lib.training.preview_tk import PreviewTk </s> remove from .augmentation import ImageAugmentation  # noqa
from .generator import PreviewDataGenerator, TrainingDataGenerator  # noqa
from .preview_cv import PreviewBuffer , TriggerType # noqa
 </s> add from .augmentation import ImageAugmentation
from .generator import PreviewDataGenerator, TrainingDataGenerator
from .preview_cv import PreviewBuffer, TriggerType
import cv2
  from typing import cast, Dict, List, Optional, Sequence, Tuple
  
import cv2
  import numpy as np
  from PIL import Image, ImageDraw, ImageTk
  
  from lib.training.preview_cv import PreviewBuffer
  
keep add keep keep keep keep keep
 GUI - Preview updates
  - Training preview. Embed preview pop-out window
  - Bugfix - convert/extract previews 
lib/gui/utils/image.py