code: def test_isin():
      elements = torch.tensor([2, 3, 5, 5, 20, 13, 11], device=F.ctx())
      test_elements = torch.tensor([2, 5], device=F.ctx())
      res = gb.isin(elements, test_elements)
      expected = torch.tensor(
          [True, False, True, True, False, False, False], device=F.ctx()
      )
      assert torch.equal(res, expected)
  
file_path: dgl/tests/python/pytorch/graphbolt/test_base.py
imports: import re
  import unittest
  from collections.abc import Iterable, Mapping
  import backend
  import dgl.graphbolt
  import pytest
  import torch
  from .None import gb_test_utils
label_desc: Use image node_id 5 for calling a global function with example usage: test_isin() without return types