code: def test_is_in(elements, value, expected):
      assert nbcollection.is_in(elements, value) == expected
  
imports: import pytest
  import pandas
  import numpy
  from sklearn_evaluation import NotebookCollection
  from sklearn_evaluation.nb import NotebookCollection
  from IPython.display import HTML
label_desc: Use image node_id 5 for calling a global function with example usage: test_is_in(elements, value, expected) without return types