code: def tracker(self):
      tracker = QueryExecTracker()
      tracker.start_new_track()
      tracker.add_query_info(
          conversation_id="123",
          instance="SmartDatalake",
          query="which country has the highest GDP?",
          output_type="json",
      )
      return tracker
  
imports: import json
  import os
  import time
  from typing import Optional
  from unittest.mock import MagicMock, Mock, patch
  import pandas
  import pytest
  from pandasai.helpers.query_exec_tracker import QueryExecTracker
  from pandasai.llm.fake import FakeLLM
  from pandasai.smart_dataframe import SmartDataframe
  from unittest import TestCase
  from datetime import datetime, timedelta
label_desc: Use image node_id 5 for calling the TestQueryExecTracker obj's underlying member method code with example usage: obj.tracker() and returns: tracker