code: def __str__(self):
      return self.trial_name
  
imports: from collections import namedtuple
  from dataclasses import dataclass
  from typing import Dict
  from unittest.mock import Mock
  from wandb.util import json_dumps_safer
  import ray
  from ray.air.integrations.wandb import _WandbLoggingActor, WandbLoggerCallback
label_desc: Use image node_id 2 for calling the Trial obj's underlying member method code with example usage: obj.__str__() and returns: self