message: Reworded for clarity.
diff: @@ -699,8 +699,11 @@ class DatasetV2(tracking_base.Trackable, composite_tensor.CompositeTensor):
  def prefetch(self, buffer_size):
  """Creates a `Dataset` that prefetches elements from this dataset.
  - NOTE: If prefetch after batch, such as: dataset.batch(20).prefetch(2),
  - which means prefetch 2 batches, totally 40 samples.
  + Note: Like other `Dataset` methods, prefetch operates on the elements of
  + the dataset. It has no concept of examples vs. batches. `examples.prefetch(2)`
  + will prefetch two elements (2 examples), while `examples.batch(20).prefetch(2)`
  + will prefetch 2 elements (2 batches, of 20 examples each). The typical
  + use-case is to `prefetch` batches.
  Args:
  buffer_size: A `tf.int64` scalar `tf.Tensor`, representing the maximum
  