  import numpy as np
  import pytest
  
  from lib.model import normalization
  from lib.utils import get_backend
  
  from tests.lib.model.layers_test import layer_test
  
 
</s> remove from keras import regularizers
 </s> add import numpy as np </s> remove     from .normalization_plaid import *
 </s> add     from .normalization_plaid import LayerNormalization, RMSNormalization </s> remove from .normalization_common import *
 </s> add from .normalization_common import AdaInstanceNormalization
from .normalization_common import GroupNormalization
from .normalization_common import InstanceNormalization
 </s> remove     from .normalization_tf import *
 </s> add     from .normalization_tf import LayerNormalization, RMSNormalization
from keras import regularizers, models, layers

  import numpy as np
  import pytest
  
from keras import regularizers, models, layers

  from lib.model import normalization
  from lib.utils import get_backend
  
  from tests.lib.model.layers_test import layer_test
  
keep keep add keep keep keep keep keep
 Unit tests - lib.model.normalization
  - __init__.py - Explicit imports (to fix pytests)
  - Add tests for all existing normalization layers
  - fix GroupNormalization for tensorflow backend 
tests/lib/model/normalization_test.py