code: def test_with_valid_multi_label_constraint(self):
      sls = FakeMultiLabelQueryStrategy()
      self._test_query_strategy(sls, multi_label=True)
  
imports: import unittest
  import scipy
  import numpy
  from small_text.classifiers.classification import SklearnClassifier, ConfidenceEnhancedLinearSVC
  from small_text.query_strategies.base import ClassificationType, constraints
  from small_text.query_strategies.strategies import RandomSampling
  from tests.utils.datasets import random_sklearn_dataset
label_desc: Use image node_id 4 for calling the ConstraintTest obj's underlying member method code with example usage: obj.test_with_valid_multi_label_constraint() without return types