Method isPaymentNotUsed

/* Checkout - is there even some payment NOT is used reverse - used only in online shop type
 * This function is different to getPossiblePaymentMethods()
 *
 * getPossiblePaymentMethods() - all methods they fit the criterias (e.g. amount rule, contry rule, etc.)
 * isPaymentNotUsed() - all existing methods in shop which are published
 *
 * * IF NO PAYMENT METHOD EXIST - it is ignored when 1) skip_payment_method parameter is enabled 2) all products are digital and skip_payment_method is enabled
 *
 * */
public static function isPaymentNotUsed($options = array())
{
    $paramsC = PhocacartUtils::getComponentParameters();
    $skip_payment_method = $paramsC->get('skip_payment_method', 0);
    // 1) TEST IF ANY PAYMENT METHOD EXISTS
    $db = Factory::getDBO();
    $query = 'SELECT a.id' . ' FROM #__phocacart_payment_methods AS a' . ' WHERE a.published = 1' . ' AND a.type IN (0,1)' . ' ORDER BY id LIMIT 1';
    $db->setQuery($query);
    $methods = $db->loadObjectList();
    if (empty($methods) && $skip_payment_method == 2) {
        return true;
    }
    // 2) TEST IF PAYMENT METHOD IS NOT DISABLED FOR CART WITH EMPTY PRICE (CART SUM = 0)
    if (isset($options['order_amount_zero']) && $options['order_amount_zero'] == 1 && $skip_payment_method == 1) {
        return true;
    }
    return false;
}