code: def dataset():
      """Load unit_test train and test data set from sktime.
  
      :return: tuple, (X_train, y_train, X_test, y_test).
      """
      X_train, y_train = load_unit_test(split="train")
      X_test, y_test = load_unit_test(split="test")
      return (X_train, y_train, X_test, y_test)
  
imports: import numpy
  import pytest
  from sktime.classification.dictionary_based import BOSSEnsemble, IndividualBOSS
  from sktime.datasets import load_unit_test
  from sktime.tests.test_switch import run_test_for_class
label_desc: Use image node_id 1 for calling a global function with example usage: dataset() and returns: X_train,  y_train,  X_test,  y_test