class_docstr: Action distribution P(a1, a2) = P(a1) * P(a2 | a1)
code: def required_model_output_shape(action_space, model_config):
      return 16
  
imports: from ray.rllib.models.tf.tf_action_dist import Categorical, ActionDistribution
  from ray.rllib.models.torch.torch_action_dist import TorchCategorical, TorchDistributionWrapper
  from ray.rllib.utils.framework import try_import_tf, try_import_torch
label_desc: Use image node_id 9 for calling the BinaryAutoregressiveDistribution obj's underlying member method code with example usage: obj.required_model_output_shape(action_space, model_config) and returns: int