Function isAllowedLanguage

src/notebook.ts:22–24

(language: Language)

type AllowedLanguages = keyof typeof NOTEBOOK_LANGUAGES;

function isAllowedLanguage(language: Language) {
  return Object.prototype.hasOwnProperty.call(NOTEBOOK_LANGUAGES, language);
}

// In Jupyter, we can have cells which are neither Markdown nor Python, so we
// need to define both functions in the interface.