from typing import Union

def get_bool_emoji(value: bool) -> str:
    """Returns a unicode emoji based on a boolean value."""
    if value is True:
        return "\N{WHITE HEAVY CHECK MARK}"
    if value is False:
        return "\N{NO ENTRY SIGN}"
    return "\N{BLACK QUESTION MARK ORNAMENT}\N{VARIATION SELECTOR-16}"

def get_pagesize_str(value: Union[int, None]) -> str:
    """Returns a string based on a pagesize value."""
    if value is None:
        return "\N{BLACK QUESTION MARK ORNAMENT}\N{VARIATION SELECTOR-16}"
    return str(value) + " cases per page"