code: def test_setitem_missing_values(na):
      arr = pd.array([True, False, None], dtype="boolean")
      expected = pd.array([True, None, None], dtype="boolean")
      arr[1] = na
      tm.assert_extension_array_equal(arr, expected)
  
imports: import numpy
  import pytest
  import pandas
  import pandas._testing
label_desc: Use image node_id 1 for calling a global function with example usage: test_setitem_missing_values(na) without return types