class_docstr: Test the empty regularizer.
code: def test_apply_only_once(self):  # noqa: D102
      raise unittest.SkipTest()
  
imports: import unittest
  from typing import Sequence
  import pytest
  import torch
  import unittest_templates
  from torch.nn import functional
  import pykeen.regularizers
  from pykeen.utils import get_expected_norm
  from tests import cases
  from tests.utils import rand
label_desc: Use image node_id 2 for calling the NoRegularizerTest obj's underlying member method code with example usage: obj.test_apply_only_once() without return types