Iterator<Order> iter = orders.iterator();
        while (iter.hasNext()) {
            Order order = iter.next();
            if (order.getCurrencies() == null || order.getCurrencies().isEmpty()) {
                iter.remove();
                continue;
            }
            for (Currencies currencies : order.getCurrencies()) {
                if (currencies.getSum() == null) {
                    iter.remove();
                    continue;
                }
            }
        }

return orders.stream().filter(pl -> pl.getCurrencies().stream().allMatch(cur -> cur.getSum() != null)).collect(Collectors.toList());