code: private String lookupAdditionalSite(String rootPath) {
  
          for (int i = 0, size = m_additionalSiteRoots.size(); i < size; i++) {
              String siteRoot = m_additionalSiteRoots.get(i);
              if (rootPath.startsWith(siteRoot + "/")) {
                  return siteRoot;
              }
          }
          return null;
      }
docs: Returns <code>true</code> if the given root path matches any of the stored additional sites.<p>
  
  @param rootPath the root path to check
  
  @return <code>true</code> if the given root path matches any of the stored additional sites