code: def _assert_struct_lists_equal(self, actual, expected):
      self.assertEqual(len(actual), len(expected))
      for actual_elem, expected_elem in zip(actual, expected):
          self.assertEqual(actual_elem, expected_elem)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import functools
  from absl.testing import absltest
  from absl.testing import parameterized
  import mock
  from third_party.nucleus.protos import struct_pb2
  from third_party.nucleus.protos import variants_pb2
  from third_party.nucleus.util import struct_utils
  from third_party.nucleus.util import variantcall_utils
label_desc: Use image node_id 1 for calling the VariantcallUtilsTests obj's underlying member method code with example usage: obj._assert_struct_lists_equal(actual, expected) without return types