code: def test_softmax_transform_dataset_doesnt_change():
      postprocessor = postprocessors.SoftmaxPostprocessor()
      dataset = tf.data.Dataset.from_tensor_slices([1, 2]).batch(32)
  
      assert postprocessor.transform(dataset) is dataset
  
file_path: autokeras/autokeras/preprocessors/postprocessors_test.py
imports: import numpy
  import tensorflow
  from autokeras import preprocessors
  from autokeras.preprocessors import postprocessors
label_desc: Use image node_id 5 for calling a global function with example usage: test_softmax_transform_dataset_doesnt_change() without return types