protected MaintenanceLock verifyAllLocksFromThisDocument( List<MaintenanceLock> maintenanceLocks, String documentNumber) { for (MaintenanceLock maintenanceLock : maintenanceLocks) { String lockingDocNumber = maintenanceDocumentDao.getLockingDocumentNumber( maintenanceLock.getLockingRepresentation(), documentNumber); if (StringUtils.isNotBlank(lockingDocNumber)) { return maintenanceLock; } } return null; }