code: def test_groups_instance_norm(self):
      # GroupNormalization with groups=-1 will become InstanceNormalization
      instance_norm_layer_1 = layers.GroupNormalization(
          groups=-1, axis=-1, scale=False, center=False
      )
      instance_norm_layer_2 = layers.GroupNormalization(
          groups=4, axis=-1, scale=False, center=False
      )
      inputs = np.array([[[-1.0, 1.0, 0, 2.0], [1.0, 3.0, -4, -2.0]]])
  
      outputs_1 = instance_norm_layer_1(inputs)
      outputs_2 = instance_norm_layer_2(inputs)
  
      self.assertAllClose(outputs_1, outputs_2)
  
file_path: keras/keras/layers/normalization/group_normalization_test.py
imports: import numpy
  import pytest
  from keras import constraints
  from keras import layers
  from keras import regularizers
  from keras import testing
label_desc: Use image node_id 5 for calling the GroupNormalizationTest obj's underlying member method code with example usage: obj.test_groups_instance_norm() without return types