def METHOD_NAME(cls, elem: typing.Union[Tag, NavigableString]) -> bool:
    return (
        cls._is_standard_quote(elem)
        or cls._is_thunderbird_quote(elem)
        or cls._is_gmail_quote(elem)
        or cls._is_outlook_com_quote(elem)
        or cls._is_yahoo_quote(elem)
        or cls._is_roundcube_quote(elem)
    )