[language-model-availability.tentative.https.window.html]
  [LanguageModel.availability() is defined]
    expected: FAIL

  [LanguageModel.availability() returns a valid value with no options]
    expected: FAIL

  [LanguageModel.availability() rejects when given invalid language tags]
    expected: FAIL

  [LanguageModel.availability() returns a valid value with plausible options]
    expected: FAIL