code: def setup_method(self):
      super().setup_method()
      self.op_class = SumDiffOp
  
imports: import unittest
  import pytensor
  from pytensor.graph.basic import Apply
  from pytensor.graph.op import Op
  from pytensor.tensor.type import TensorType
  from tests import unittest_tools
  from pytensor import tensor
  from pytensor.graph.basic import Apply
  from pytensor.tensor.type import dmatrix, matrix
  import numpy
  import pytensor
  from pytensor.compile.ops import as_op
label_desc: Use image node_id 1 for calling the TestSumDiffOp obj's underlying member method code with example usage: obj.setup_method() without return types