code: def test_deep_estimator_empty():
      """Check if serialization works for empty dummy."""
      empty_dummy = _DummyDeepClassifierEmpty()
      serialized_empty = pickle.dumps(empty_dummy)
      deserialized_empty = pickle.loads(serialized_empty)
      assert empty_dummy.__dict__ == deserialized_empty.__dict__
  
imports: import pickle
  import numpy
  import pandas
  import pytest
  from sklearn.model_selection import KFold
  from sktime.classification.base import BaseClassifier
  from sktime.classification.deep_learning.base import BaseDeepClassifier
  from sktime.classification.distance_based import KNeighborsTimeSeriesClassifier
  from sktime.classification.dummy import DummyClassifier
  from sktime.utils._testing.estimator_checks import _assert_array_almost_equal
  from sktime.utils._testing.panel import _make_classification_y, _make_panel, make_classification_problem
  from sktime.utils.validation._dependencies import _check_soft_dependencies
label_desc: Use image node_id 13 for calling a global function with example usage: test_deep_estimator_empty() without return types