code: def test_isna_returns_copy(self, data_missing, na_func):
      result = pd.Series(data_missing)
      expected = result.copy()
      mask = getattr(result, na_func)()
      if isinstance(mask.dtype, pd.SparseDtype):
          mask = np.array(mask)
  
      mask[:] = True
      tm.assert_series_equal(result, expected)
  
file_path: pandas/pandas/tests/extension/base/missing.py
imports: import numpy
  import pytest
  import pandas
  import pandas._testing
label_desc: Use image node_id 2 for calling the BaseMissingTests obj's underlying member method code with example usage: obj.test_isna_returns_copy(data_missing, na_func) without return types