code: def get_sum_func(self):
      return cupy.ReductionKernel(
          "T x", "T out", "x", "a + b", "out = a", "0", "my_sum"
      )
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  import cupy._core._accelerator
  from cupy import _core
  from cupy import testing
label_desc: Use image node_id 1 for calling the ReductionKernelTestBase obj's underlying member method code with example usage: obj.get_sum_func() and returns: cupy