code: def test_image_build_return_tensor():
      block = blocks.ImageBlock()
  
      outputs = block.build(
          keras_tuner.HyperParameters(),
          keras.Input(shape=(32, 32, 3), dtype=tf.float32),
      )
  
      assert len(nest.flatten(outputs)) == 1
  
imports: import keras_tuner
  import tensorflow
  from tensorflow import keras
  from tensorflow import nest
  from autokeras import analysers
  from autokeras import blocks
  from autokeras import test_utils
label_desc: Use image node_id 1 for calling a global function with example usage: test_image_build_return_tensor() without return types