code: def test_registry_instance_defaults():
      expected_classes = {
          DatabricksNotebookExperimentProvider,
      }
      assert expected_classes.issubset(
          _currently_registered_default_experiment_provider_classes()
      )
  
file_path: mlflow/tests/tracking/default_experiment/test_registry.py
imports: from importlib import reload
  from unittest import mock
  import pytest
  import mlflow.tracking.default_experiment.registry
  from mlflow.tracking.default_experiment.databricks_notebook_experiment_provider import DatabricksNotebookExperimentProvider
  from mlflow.tracking.default_experiment.registry import DefaultExperimentProviderRegistry, get_experiment_id
label_desc: Use image node_id 5 for calling a global function with example usage: test_registry_instance_defaults() without return types