code: def setUp(self):
      self.bam = test_utils.genomics_core_testdata("test.bam")
      self.options = reads_pb2.SamReaderOptions()
  
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.io import clif_postproc
  from third_party.nucleus.io.python import sam_reader
  from third_party.nucleus.protos import reads_pb2
  from third_party.nucleus.protos import reference_pb2
  from third_party.nucleus.testing import test_utils
  from third_party.nucleus.util import ranges
label_desc: Use image node_id 1 for calling the SamReaderTest obj's underlying member method code with example usage: obj.setUp() without return types