def METHOD_NAME(parameters: JSONMapping | None) -> bool:
    """
    Args:
        parameters (dict or None): parameters dictionary, or None
    Return True if the parameters dictionary is considered empty, either because it is
    None, or because it does not have any meaningful (non-None) values; otherwise,
    return False.
    """
    if parameters is None:
        return True
    for item in parameters.values():
        if item is not None:
            return False
    return True