code: def test_two(self):
      assert internal.prod_sequence((2, 3)) == 6
  
imports: import math
  import unittest
  import numpy
  import pytest
  from cupy._core import internal
  from cupy import testing
label_desc: Use image node_id 3 for calling the TestProdSequence obj's underlying member method code with example usage: obj.test_two() without return types