code: def test_get_default_pinned_memory_pool(self):
      p = cupy.get_default_pinned_memory_pool()
      assert isinstance(p, cupy.cuda.pinned_memory.PinnedMemoryPool)
  
imports: import operator
  import os
  import shutil
  import subprocess
  import sys
  import tempfile
  import unittest
  from unittest import mock
  import numpy
  import pytest
  import cupy
  import cupyx
label_desc: Use image node_id 2 for calling the TestMemoryPool obj's underlying member method code with example usage: obj.test_get_default_pinned_memory_pool() without return types