code: def perform(self, node, inputs, output_storage):
      x, y = inputs
      z1, z2 = output_storage
      z1[0] = x + y
      z2[0] = x - y
  
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 2 for calling the SumDiffOp obj's underlying member method code with example usage: obj.perform(node, inputs, output_storage) without return types