code: def default_tracker(domain: Domain) -> DialogueStateTracker:
      return DialogueStateTracker("my-sender", domain.slots)
  
imports: import asyncio
  from rasa.utils.endpoints import EndpointConfig
  from sanic.request import Request
  import uuid
  from datetime import datetime
  from typing import Generator, Callable, Dict, Text
  from scipy import sparse
  import pytest
  from rasa.core.agent import Agent
  from rasa.core.channels.channel import CollectingOutputChannel, OutputChannel
  from rasa.shared.core.domain import Domain
  from rasa.shared.core.events import ReminderScheduled, UserUttered, ActionExecuted
  from rasa.core.nlg import TemplatedNaturalLanguageGenerator, NaturalLanguageGenerator
  from rasa.core.processor import MessageProcessor
  from rasa.shared.core.slots import Slot
  from rasa.core.tracker_store import MongoTrackerStore
  from rasa.shared.core.trackers import DialogueStateTracker
  from rasa.shared.nlu.training_data.features import Features
  from rasa.shared.nlu.constants import INTENT, ACTION_NAME, FEATURE_TYPE_SENTENCE
  from tests.dialogues import TEST_MOODBOT_DIALOGUE
  from tests.core.utilities import tracker_from_dialogue
label_desc: Use image node_id 5 for calling a global function with example usage: default_tracker(domain) and returns: DialogueStateTracker