docs: public String processInterfaceType(DescriptionType descriptionType, InterfaceType interfaceType, boolean addAddress)
      {
          String interfaceName = interfaceType.getName();
          String allAddress = DBConstants.BLANK;
          
          for (Object nextElement : interfaceType.getOperationOrFaultOrFeature())
          {
              Object interfaceOperationType = null;
              if (nextElement instanceof JAXBElement)
                  interfaceOperationType = ((JAXBElement)nextElement).getValue();
              if (interfaceOperationType instanceof InterfaceOperationType)
              {
                  String address = this.processInterfaceOperationType(descriptionType, interfaceName, (InterfaceOperationType)interfaceOperationType, addAddress);
                  if (allAddress != null)
                  {
                      if (allAddress == DBConstants.BLANK)
                          allAddress = address;
                      else if (!allAddress.equalsIgnoreCase(address))
                          allAddress = null;  // null = not all address are the same
                  }
              }
          }
          
          return allAddress;
      }