docs: public static String getAdjustedSiteRoot(String siteRoot, String resourcename) {
  
          if (resourcename.startsWith(CmsWorkplace.VFS_PATH_SYSTEM)
              || OpenCms.getSiteManager().startsWithShared(resourcename)
              || (resourcename.startsWith(CmsWorkplace.VFS_PATH_SITES) && !resourcename.startsWith(siteRoot))) {
              return "";
          } else {
              return siteRoot;
          }
      }