message: SequenceFeatures => Modified the Example code such that it is executable
  Github Gist for working code is
  Fixes
diff: @@ -73,11 +73,8 @@ class SequenceFeatures(kfc._BaseFeaturesLayer):
  sequence_input_layer = tf.keras.experimental.SequenceFeatures(columns)
  sequence_input, sequence_length = sequence_input_layer(
  features, training=training)
  -
  sequence_length_mask = tf.sequence_mask(sequence_length)
  -
  hidden_size = 32
  -
  rnn_cell = tf.keras.layers.SimpleRNNCell(hidden_size)
  rnn_layer = tf.keras.layers.RNN(rnn_cell)
  outputs, state = rnn_layer(sequence_input, mask=sequence_length_mask)
  