class_docstr: Abstract base class for a BnnOperator that can be multiplied.
code: def penultimate(self, inputs):
      raise NotImplementedError(
          "Subclasses of MultipliableBnnOperator must define this."
      )
  
imports: from typing import Optional
  from flax import linen
  import jax.numpy
  from tensorflow_probability.python.experimental.autobnn import bnn
  from tensorflow_probability.python.experimental.autobnn import likelihoods
  from tensorflow_probability.substrates.jax.bijectors import chain
  from tensorflow_probability.substrates.jax.bijectors import scale
  from tensorflow_probability.substrates.jax.bijectors import shift
  from tensorflow_probability.substrates.jax.distributions import beta
  from tensorflow_probability.substrates.jax.distributions import dirichlet
  from tensorflow_probability.substrates.jax.distributions import half_normal
  from tensorflow_probability.substrates.jax.distributions import normal
  from tensorflow_probability.substrates.jax.distributions import transformed_distribution
label_desc: Use image node_id 2 for calling the MultipliableBnnOperator obj's underlying member method code with example usage: obj.penultimate(inputs) without return types