code: def return_na_check(data):
      """Helper function for tests to check if the data returned is a
         numpy array and that the imputed data has no NaN's.
  
      Parameters
      ----------
      data: numpy.ndarray
          Data to impute.
  
      Returns
      -------
      None
  
      """
      assert isinstance(data, np.ndarray)
      assert not np.isnan(data).any()
  
label_desc: Use image node_id 1 for calling a global function with example usage: return_na_check(data) without return types