code: def test_del_multiple_variables(self):
      self.model.del_variables(["x1", "x2"])
      np_test.assert_array_equal(self.model.variables, np.array(["x3"]))
      np_test.assert_array_equal(self.model.cardinality, np.array([2]))
      self.assertListEqual(
          self.model.inhibitor_probability, [[0.1, 0.4]]
      )
  
file_path: pgmpy/pgmpy/tests/test_models/test_NoisyOrModels.py
imports: import unittest
  import numpy
  import numpy.testing
  from pgmpy.models import NoisyOrModel
label_desc: Use image node_id 4 for calling the TestNoisyOrModelMethods obj's underlying member method code with example usage: obj.test_del_multiple_variables() without return types