code: def setUp(self):
      super(VcfStatsTest, self).setUp()
      self.variant = test_utils.make_variant(
          chrom="chr1", start=10, alleles=["A", "G"], gt=[0, 1], gq=59
      )
      variantcall_utils.set_format(
          variant_utils.only_call(self.variant), "DP", 20
      )
  
imports: import collections
  import json
  import os
  import tempfile
  from absl.testing import absltest
  from absl.testing import parameterized
  import tensorflow
  from deepvariant import testdata
  from deepvariant import vcf_stats
  from third_party.nucleus.io import vcf
  from third_party.nucleus.testing import test_utils
  from third_party.nucleus.util import variant_utils
  from third_party.nucleus.util import variantcall_utils
label_desc: Use image node_id 1 for calling the VcfStatsTest obj's underlying member method code with example usage: obj.setUp() without return types