code: def __init__(self):
      self._params = {"parameter_id": 0, "parameters": {}}
      self._last_metric = None
  
      self.intermediates = []
      self.final = None
  
file_path: nni/test/ut/sdk/helper/trial_command_channel.py
imports: from __future__ import annotations
  import copy
  from typing_extensions import Literal
  from nni.runtime.trial_command_channel import TrialCommandChannel
  from nni.typehint import TrialMetric, ParameterRecord
label_desc: Use image node_id 1 to create a new TestHelperTrialCommandChannel object from inherited base classes: TrialCommandChannel with example: obj = TestHelperTrialCommandChannel()