message: Add runnable example for tf.keras.utils.plot_model.
diff: @@ -261,6 +261,22 @@ def plot_model(model,
  dpi=96):
  """Converts a Keras model to dot format and save to a file.
  + Example:
  +
  + ```python
  + input = tf.keras.Input(shape=(100,), dtype='int32', name='input')
  + x = tf.keras.layers.Embedding(
  + output_dim=512, input_dim=10000, input_length=100)(input)
  + x = tf.keras.layers.LSTM(32)(x)
  + x = tf.keras.layers.Dense(64, activation='relu')(x)
  + x = tf.keras.layers.Dense(64, activation='relu')(x)
  + x = tf.keras.layers.Dense(64, activation='relu')(x)
  + output = tf.keras.layers.Dense(1, activation='sigmoid', name='output')(x)
  + model = tf.keras.Model(inputs=[input], outputs=[output])
  + dot_img_file = '/tmp/model_1.png'
  + tf.keras.utils.plot_model(model, to_file=dot_img_file, show_shapes=True)
  + ```
  +
  Arguments:
  model: A Keras model instance
  to_file: File name of the plot image.
  