Calling tensorflow maxout in Keras

Since maxoutdense has been deprecated in Keras, we may call it through Keras Lambda layer, e.g.:

import tensorflow as tf
maxout = Lambda(
  lambda x: tf.contrib.layers.maxout(x, num_units=768),
  output_shape=None,
  mask=None,
  arguments=None,
  name='Maxout'
  )(dropout)