public Date getFromOpenDate () {
        Date fromOpenDate = null;

        for (ReceptionsFilter filter: filters) {
            if (filter instanceof OpenDateReceptionsFilter) {
                OpenDateReceptionsFilter openDateFilter = (OpenDateReceptionsFilter) filter;
                Date filterFromOpenDate =  openDateFilter.getFromDate();
                if (fromOpenDate == null || (fromOpenDate != null && filterFromOpenDate != null && fromOpenDate.getTime() < filterFromOpenDate.getTime()) )  {
                    fromOpenDate = filterFromOpenDate;
                }

            }
        }

        return fromOpenDate;
    }