code: def __repr__(self) -> str:
      if self.exception is None:
          return f'MetricFetchE(message="{self.message}")'
  
      return (
          f'MetricFetchE(message="{self.message}", exception={self.exception})\n'
          f"with Traceback:\n {self.tb_str()}"
      )
  
imports: from __future__ import annotations
  import traceback
  import warnings
  from dataclasses import dataclass
  from functools import reduce
  from logging import Logger
  from typing import Any, Dict, Iterable, List, Mapping, Optional, Tuple, Type, TYPE_CHECKING
  from ax.core.data import Data
  from ax.utils.common.base import SortableBase
  from ax.utils.common.logger import get_logger
  from ax.utils.common.result import Err, Ok, Result, UnwrapError
  from ax.utils.common.serialization import SerializationMixin
label_desc: Use image node_id 2 for calling the MetricFetchE obj's underlying member method code with example usage: obj.__repr__() and returns: str, self, str, self, str, self, str, self, str