message: Add Returns section
diff: @@ -70,6 +70,9 @@ class VocabInfo(
  linear weights for binary classification / regression). An axis of 1
  could be used for warm-starting output layers with class vocabularies.
  + Returns:
  + A `VocabInfo` which represents the vocabulary information for warm-starting.
  +
  Example Usage:
  ```python
  embeddings_vocab_info = tf.VocabInfo(
  