code: private PathInfoHelper removeExtraPathInfo(String pathInfo) {
          if (pathInfo == null)
              return null;
  
          int semicolon = pathInfo.indexOf(';');
          if (semicolon != -1) {
              String tmpPathInfo = pathInfo.substring(0, semicolon);
              String extraPathInfo = pathInfo.substring(semicolon);
              return new PathInfoHelper(tmpPathInfo, extraPathInfo);
          }
          return new PathInfoHelper(pathInfo, null);
  
      }
docs: begin 272738    Duplicate CacheServletWrappers when url-rewriting is enabled    WAS.webcontainer