code: def test_get_host_creds_from_default_store_rest_store():
      with mock.patch(
          "mlflow.tracking._tracking_service.utils._get_store",
          return_value=RestStore(
              lambda: MlflowHostCreds("http://host")
          ),
      ):
          assert isinstance(
              _get_host_creds_from_default_store()(), MlflowHostCreds
          )
  
imports: import json
  import os
  from unittest import mock
  from unittest.mock import Mock
  import pytest
  from mlflow.exceptions import MlflowException
  from mlflow.store.artifact.artifact_repository_registry import get_artifact_repository
  from mlflow.store.artifact.dbfs_artifact_repo import DbfsRestArtifactRepository, _get_host_creds_from_default_store
  from mlflow.store.tracking.file_store import FileStore
  from mlflow.store.tracking.rest_store import RestStore
  from mlflow.utils.rest_utils import MlflowHostCreds, http_request
label_desc: Use image node_id 16 for calling a global function with example usage: test_get_host_creds_from_default_store_rest_store() without return types