code: def get_default_config(cls) -> AlgorithmConfig:
      return A2CConfig()
  
imports: import logging
  import math
  from typing import Optional
  from ray.rllib.algorithms.a3c.a3c import A3C, A3CConfig
  from ray.rllib.algorithms.algorithm import Algorithm
  from ray.rllib.algorithms.algorithm_config import AlgorithmConfig, NotProvided
  from ray.rllib.execution.rollout_ops import synchronous_parallel_sample
  from ray.rllib.policy.sample_batch import DEFAULT_POLICY_ID
  from ray.rllib.utils.annotations import override
  from ray.rllib.utils.metrics import APPLY_GRADS_TIMER, COMPUTE_GRADS_TIMER, NUM_AGENT_STEPS_SAMPLED, NUM_AGENT_STEPS_TRAINED, NUM_ENV_STEPS_SAMPLED, NUM_ENV_STEPS_TRAINED, SAMPLE_TIMER, SYNCH_WORKER_WEIGHTS_TIMER
  from ray.rllib.utils.typing import ResultDict
label_desc: Use image node_id 1 for calling the A2C obj's underlying member method code with example usage: obj.get_default_config(cls) and returns: A2CConfig