def get_description_value(obj):
    """
    Returns object description from LLDB value.

    :param lldb.SBValue obj: LLDB value object.
    :return: Object description from LLDB value.
    :rtype: str | None
    """
    desc = None if obj is None else obj.GetObjectDescription()
    if desc == '<nil>':
        desc = None
    return desc
