ProductVersionList AbstractUpdateConfig::availableUpdates (const ProductVersion &currentProductVersion_) const
{
    ProductVersionList l;

    if (productVersionList_.empty () || currentProductVersion_.empty ()) {
        return l;
    }

    const ProductVersionList::const_iterator &it = productVersionList_.lower_bound (currentProductVersion_);

    if (it != productVersionList_.begin ()) {
        l.insert (productVersionList_.begin (), it);
    }

    return l;
}