def METHOD_NAME(self):
    # Checks the fix_lbrow_lbnpt is applied to fields which are not
    # deferred.
    f1, mask = self.pp_field, self.land_mask_field
    self.assertEqual(f1.lbrow, 0)
    self.assertEqual(f1.lbnpt, 0)
    list(pp._interpret_fields([mask, f1]))
    self.assertEqual(f1.lbrow, 3)
    self.assertEqual(f1.lbnpt, 4)
    # Check the data's shape has been updated too.
    self.assertEqual(f1.data.shape, (3, 4))