code: def _make_input_layers(self):
      return tf_keras.layers.Input(self.image_shape)
  
imports: import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.distributions import pixel_cnn
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.internal import tf_keras
  from tensorflow_probability.python.math import gradient
label_desc: Use image node_id 6 for calling the PixelCnnTest obj's underlying member method code with example usage: obj._make_input_layers() and returns: tf_keras