code: def __init__(
      self,
      downstream: Union[ActorHandle, DeploymentHandle],
      *,
      mode: IOMode,
      tokens_per_request: int,
      batch_size: int,
      num_trials: int,
      trial_runtime: float,
  ):
      self._h = downstream
      self._mode = mode
      self._tokens_per_request = tokens_per_request
      self._batch_size = batch_size
      self._num_trials = num_trials
      self._trial_runtime = trial_runtime
      self._durations = []
  
      # Switch off logging to minimize its impact
      logging.getLogger("ray").setLevel(logging.WARNING)
      logging.getLogger("ray.serve").setLevel(logging.WARNING)
  
imports: import abc
  import asyncio
  import enum
  import logging
  import time
  from typing import Tuple, Union
  import numpy
  from ray.actor import ActorHandle
  from ray.runtime_env import RuntimeEnv
  from ray.serve._private.benchmarks.common import Blackhole, run_throughput_benchmark
  from ray.serve._private.benchmarks.serialization.common import PayloadPydantic
  from ray.serve.handle import DeploymentHandle
label_desc: Use image node_id 1 to create a new Caller object from inherited base classes: Blackhole with example: obj = Caller(downstream)