code: def test_cast_constant(self):
      class MyModule(Module):
          def forward(self, x):
              return x - 1
  
      module = MyModule()
      ops_8 = [
          {"op_name": "Constant"},
          {
              "op_name": "Cast",
              "attributes": [{"name": "to", "i": 7, "type": 2}],
          },
          {"op_name": "Sub"},
      ]
      ops_9 = [{"op_name": "Constant"}, {"op_name": "Sub"}]
      ops = {8: ops_8, 9: ops_9}
      x = torch.ones(5, 6, dtype=torch.long)
      check_onnx_opsets_operator(module, x, ops, opset_versions=[8, 9])
  
imports: import io
  import itertools
  import onnx
  import pytorch_test_common
  import torch
  import torch.onnx
  from torch.nn import Module
  from torch.onnx import producer_name, producer_version
  from torch.onnx._globals import GLOBALS
  from torch.testing._internal import common_utils
label_desc: Use image node_id 5 for calling the TestONNXOpset obj's underlying member method code with example usage: obj.test_cast_constant() and returns: unknown