code: def testSimpleCaseNCHWTensor(self):
      layer = group_norm.GroupNorm(
          groups=5,
          data_format="NCHW",
          create_scale=False,
          create_offset=False,
      )
  
      inputs = tf.ones([2, 10, 3, 3])
      scale = tf.constant(0.5, shape=(10, 1, 1))
      offset = tf.constant(2.0, shape=(10, 1, 1))
  
      outputs = layer(inputs, scale, offset).numpy()
      for x in np.nditer(outputs):
          self.assertEqual(x, 2.0)
  
imports: from absl.testing import parameterized
  import numpy
  from sonnet.src import group_norm
  from sonnet.src import initializers
  from sonnet.src import test_utils
  import tensorflow
label_desc: Use image node_id 6 for calling the GroupNormTest obj's underlying member method code with example usage: obj.testSimpleCaseNCHWTensor() without return types