code: def create(policy_backbone: ModelFactory, value_backbone: ModelFactory,
             input_block: typing.Optional[ModelFactory]=None):
      
      if input_block is None:
          input_block = IdentityFactory()
  
      return DeterministicPolicyModelFactory(
          input_block=input_block, policy_backbone=policy_backbone, value_backbone=value_backbone
      )
docs: Vel factory function