code: def test_write_raises_with_unknown_sample(
      self, sample_names, message
  ):
      with self.assertRaisesRegexp(ValueError, message):
          del self.variant.calls[:]
          for sample_name in sample_names:
              self.variant.calls.add(
                  genotype=[0, 0], call_set_name=sample_name
              )
          self.writer.write(self.variant)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import copy
  from absl.testing import absltest
  from absl.testing import parameterized
  from etils import epath
  from third_party.nucleus.io import tfrecord
  from third_party.nucleus.io import vcf
  from third_party.nucleus.io.python import vcf_writer
  from third_party.nucleus.protos import reference_pb2
  from third_party.nucleus.protos import variants_pb2
  from third_party.nucleus.testing import test_utils
label_desc: Use image node_id 6 for calling the WrapVcfWriterTest obj's underlying member method code with example usage: obj.test_write_raises_with_unknown_sample(sample_names, message) without return types