code: def test_exclude_regions(self, lhs, rhs, expected):
      lhs = ranges.RangeSet.from_regions(lhs)
      rhs = ranges.RangeSet.from_regions(rhs)
      # Mutating operation returns None.
      self.assertIsNone(lhs.exclude_regions(rhs))
      self.assertCountEqual(ranges.RangeSet.from_regions(expected), lhs)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import itertools
  from absl.testing import absltest
  from absl.testing import parameterized
  import mock
  from third_party.nucleus.protos import position_pb2
  from third_party.nucleus.protos import reference_pb2
  from third_party.nucleus.protos import variants_pb2
  from third_party.nucleus.testing import test_utils
  from third_party.nucleus.util import ranges
label_desc: Use image node_id 22 for calling the RangesTests obj's underlying member method code with example usage: obj.test_exclude_regions(lhs, rhs, expected) without return types