Allow to return nil from a defn of a component
#64
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Мы уже несколько раз подорвались на коде вида
в тестах flag взведен, и все работает, т.к.
side-effectу нас возвращает неnil,но в проде он не взведен и приложение не запускается с ошибкой
"A component fn must not return nil"Можно было бы как-то внутри di вести учет nil компонентов, чтобы компонент для пользователя был настоящим
nilно я что-то не могу придумать такого случая в реальности:в этом случае сам компонент должен вернуть дефолтную реализацию.