message: Replace ref to source file with ref to optimizer flag
diff: @@ -22,8 +22,10 @@ END
  }
  summary: "Creates a dataset that takes a Bernoulli sample of the contents of another dataset."
  description: <<END
  -There is no direct Python API for creating Datasets of this type. Rewrite rules in
  -`tensorflow/core/grappler/optimizers/data/filter_with_random_uniform_fusion.cc`
  -create instances of this dataset.
  +There is no direct Python API for creating Datasets of this type.
  +TensorFlow's graph optimizer creates instances of SamplingDataset by fusing multiple
  +operations together. Use the `experimental_optimization.filter_with_random_uniform_fusion`
  +flag in `tf.data.experimental.OptimizationOptions` to control whether this
  +optimization happens.
  END
  }
  