code: def test_default_experiment_provider_registry_register():
      provider_class = mock.Mock()
  
      registry = DefaultExperimentProviderRegistry()
      registry.register(provider_class)
  
      assert set(registry) == {provider_class.return_value}
  
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 1 for calling a global function with example usage: test_default_experiment_provider_registry_register() without return types