docs: private URL getPXmlRootURL(String appName, String archiveName, Entry pxml) {
          URL pxmlUrl = pxml.getResource();
          String pxmlStr = pxmlUrl.toString();
          String pxmlRootStr = pxmlStr.substring(0, pxmlStr.length() - PERSISTENCE_XML_RESOURCE_NAME.length());
          URL pxmlRootUrl = null;
          try {
              pxmlRootUrl = new URL(pxmlRootStr);
          } catch (MalformedURLException e) {
              e.getClass(); // findbugs
              Tr.error(tc, "INCORRECT_PU_ROOT_URL_SPEC_CWWJP0025E", pxmlRootStr, appName, archiveName);
          }
          return pxmlRootUrl;
      }