code: def query_id(self):
      return self._query_id
  
imports: import argparse
  import json
  import logging
  import os
  import pickle
  import random
  import sys
  import time
  from typing import Iterable, List, Mapping, MutableMapping, Optional, Sequence, Tuple
  import numpy
  import torch
  import torch.multiprocessing
  from reagent.ope.estimators.estimator import Evaluator
  from reagent.ope.estimators.slate_estimators import DCGSlateMetric, ERRSlateMetric, FrechetDistribution, IPSEstimator, LogSample, NDCGSlateMetric, PBMEstimator, PseudoInverseEstimator, RankingDistribution, RewardDistribution, SlateContext, SlateEstimator, SlateEstimatorInput, SlateItemValues, SlateModel, SlateQuery, SlateSlots, SlateSlotValues
  from reagent.ope.utils import RunningAverage
label_desc: Use image node_id 8 for calling the TrainingQuery obj's underlying member method code with example usage: obj.query_id() and returns: self