code: def test_variantcall_format_roundtrip(
      self, field_name, setter, getter, values
  ):
      vc = variants_pb2.VariantCall()
      self.assertNotIn(field_name, vc.info)
      for value in values:
          setter(vc, value)
          if field_name not in ["GT", "GL"]:
              self.assertIn(field_name, vc.info)
          actual = getter(vc)
          self.assertEqual(actual, value)
  
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 4 for calling the VariantcallUtilsTests obj's underlying member method code with example usage: obj.test_variantcall_format_roundtrip(field_name, setter, getter, values) without return types