code: def test_warn_count_all_unnecessary(
      marker_trackerstore: TrackerStore,
  ):
      """Tests a warning is thrown when 'count' is set for strategy 'all'."""
      with pytest.warns(UserWarning):
          MarkerTrackerLoader(marker_trackerstore, STRATEGY_ALL, 3)
  
file_path: rasa/tests/core/evaluation/test_marker_tracker_loader.py
imports: import pytest
  import os
  from rasa.shared.core.events import UserUttered, SessionStarted
  from rasa.shared.core.trackers import DialogueStateTracker
  from rasa.shared.core.domain import Domain
  from rasa.shared.exceptions import RasaException
  from rasa.core.evaluation.marker_tracker_loader import MarkerTrackerLoader, STRATEGY_ALL, STRATEGY_SAMPLE_N, STRATEGY_FIRST_N
  from rasa.core.tracker_store import InMemoryTrackerStore, TrackerStore, SQLTrackerStore
label_desc: Use image node_id 6 for calling a global function with example usage: test_warn_count_all_unnecessary(marker_trackerstore) without return types