message: Added usage examples to some APIs
  Added to:
  image.random_flip_up_down
  image.flip_up_down
  image.random_flip_left_right
  image.flip_left_right
diff: @@ -356,6 +356,13 @@ def random_flip_up_down(image, seed=None):
  A tensor of the same type and shape as `image`.
  Raises:
  ValueError: if the shape of `image` not supported.
  +
  + Usage Example:
  + ```python
  + >> import tensorflow as tf
  + >> x = tf.random.normal(shape=(256, 256, 3))
  + >> tf.image.random_flip_up_down(x)
  + ```
  """
  return _random_flip(image, 0, seed, 'random_flip_up_down')
  @@ -397,6 +404,13 @@ def random_flip_left_right(image, seed=None):
  Raises:
  ValueError: if the shape of `image` not supported.
  +
  + Usage Example:
  + ```python
  + >> import tensorflow as tf
  + >> x = tf.random.normal(shape=(256, 256, 3))
  + >> tf.image.random_flip_left_right(x)
  + ```
  """
  return _random_flip(image, 1, seed, 'random_flip_left_right')
  @@ -464,6 +478,13 @@ def flip_left_right(image):
  Raises:
  ValueError: if the shape of `image` not supported.
  +
  + Usage Example:
  + ```python
  + >> import tensorflow as tf
  + >> x = tf.random.normal(shape=(256, 256, 3))
  + >> tf.image.flip_left_right(x)
  + ```
  """
  return _flip(image, 1, 'flip_left_right')
  @@ -485,6 +506,13 @@ def flip_up_down(image):
  Raises:
  ValueError: if the shape of `image` not supported.
  +
  + Usage Example:
  + ```python
  + >> import tensorflow as tf
  + >> x = tf.random.normal(shape=(256, 256, 3))
  + >> tf.image.flip_up_down(x)
  + ```
  """
  return _flip(image, 0, 'flip_up_down')
  