docs: public String processInterfaceTypes(DescriptionType descriptionType, boolean addAddress)
      {
          String allAddress = DBConstants.BLANK;
          
          for (Object nextElement : descriptionType.getImportOrIncludeOrTypes())
          {
              Object nextType = null;
              if (nextElement instanceof JAXBElement)
                  nextType = ((JAXBElement)nextElement).getValue();
              // Create the service type
              if (nextType instanceof InterfaceType)
              {
                  String address = this.processInterfaceType(descriptionType, (InterfaceType)nextType, 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;
      }