code: def instantiate(self, **extra_args):
          
          input_block = self.input_block.instantiate()
          policy_backbone = self.policy_backbone.instantiate(**extra_args)
          value_backbone = self.value_backbone.instantiate(**extra_args)
  
          return DeterministicPolicyModel(
              input_block=input_block,
              policy_backbone=policy_backbone,
              value_backbone=value_backbone,
              action_space=extra_args['action_space'],
          )
docs: Instantiate the model