code: protected MultipleSyntaxElements createAndAppendNewChildContainer(Node ref, Document document) {
          MultipleSyntaxElements ret = null;
  
          if (((Element) ref).getAttribute("minnum").equals("0")) {
              log.trace("will not create container " + getPath() + " -> " + ((Element) ref).getAttribute("type") + " " +
                  "with minnum=0");
          } else {
              ret = super.createAndAppendNewChildContainer(ref, document);
          }
  
          return ret;
      }
docs: diesen).