code: def test_get_reserved_info(self, field_id):
      info = vcf_constants.reserved_info_field(field_id)
      self.assertIsInstance(info, variants_pb2.VcfInfo)
      self.assertEqual(info.id, field_id)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import absltest
  from absl.testing import parameterized
  from third_party.nucleus.protos import variants_pb2
  from third_party.nucleus.util import struct_utils
  from third_party.nucleus.util import vcf_constants
label_desc: Use image node_id 6 for calling the VcfConstantsTest obj's underlying member method code with example usage: obj.test_get_reserved_info(field_id) without return types