code: def test_import_one_model(
      self, import_tower, get_num_towers, set_towers
  ):
      get_num_towers.side_effect = [1, 2, 1]
      output = {}
      set_output = {}
      import_tower.side_effect = functools.partial(
          _fake_import_tower_one_tower, output=output
      )
      set_towers.side_effect = functools.partial(
          _fake_set_num_towers, output=set_output
      )
      trial_utils.import_towers_one_trial(
          phoenix_spec=None,
          is_training=None,
          logits_dimension=None,
          prev_model_dir="1",
          force_freeze=None,
          allow_auxiliary_head=None,
          caller_generator="caller",
          my_model_dir=self.get_temp_dir(),
      )
      self.assertEqual(
          output,
          {
              "prior_generator_0": "caller_0",
              "replay_generator_0": "caller_1",
              "replay_generator_1": "caller_2",
              "search_generator_0": "caller_3",
          },
      )
      self.assertEqual(set_output, {"caller": 4})
      with tf.io.gfile.GFile(
          self.get_temp_dir() + "/previous_dirs_dependencies.txt", "r"
      ) as f:
          data = f.read()
      self.assertEqual(data, "1")
  
imports: import functools
  import os
  from absl.testing import absltest
  from absl.testing import parameterized
  import mock
  from model_search import hparam
  from model_search.architecture import architecture_utils
  from model_search.generators import trial_utils
  from model_search.proto import distillation_spec_pb2
  from model_search.proto import ensembling_spec_pb2
  from model_search.proto import phoenix_spec_pb2
  import tensorflow.compat.v2
  from google.protobuf import text_format
label_desc: Use image node_id 3 for calling the TrialUtilsTest obj's underlying member method code with example usage: obj.test_import_one_model(import_tower, get_num_towers, set_towers) without return types