code: def __iter__(self):
      try:
          while True:
              start = time.time()
              element = next(self.iter)
              self.timings.append(time.time() - start)
              yield element
      except StopIteration:
          return None
  
imports: import json
  import logging
  import multiprocessing
  import os
  import signal
  import time
  import traceback
  from queue import Empty
  from typing import Callable, Iterable, List, NamedTuple, Set, Tuple
  from typing_extensions import Literal
  from flask import Flask, Response, jsonify, request
  from gluonts.dataset.common import ListDataset
  from gluonts.dataset.jsonl import encode_json
  from gluonts.model.forecast import Forecast, Quantile
  from gluonts.pydantic import BaseModel, Field
  from gluonts.shell.util import forecaster_type_by_name
label_desc: Use image node_id 2 for calling the ThrougputIter obj's underlying member method code with example usage: obj.__iter__() and returns: None