code: def test_get_distribution_strategy_multi_mirror(self):
      run_kwargs = dict(worker_count=1)
      strategy = models.get_distribution_strategy_str(run_kwargs)
      self.assertEqual("multi_mirror", strategy)
  
imports: import os
  import uuid
  from absl.testing import absltest
  import mock
  import tensorflow
  from tensorflow_cloud.core import machine_config
  from tensorflow_cloud.core import run
  from tensorflow_cloud.core.experimental import models
  from official.legacy.image_classification.efficientnet import efficientnet_model
label_desc: Use image node_id 19 for calling the ModelsTest obj's underlying member method code with example usage: obj.test_get_distribution_strategy_multi_mirror() without return types