code: public String getExportPoint(String rootPath) {
  
          Iterator<String> i = getExportPointPaths().iterator();
          while (i.hasNext()) {
              String point = i.next();
              if (rootPath.startsWith(point)) {
                  return point;
              }
          }
          return null;
      }
docs: Returns the export point path for the given resource root path,
  or <code>null</code> if the resource is not contained in
  any export point.<p>
  
  @param rootPath the root path of a resource in the OpenCms VFS
  @return the export point path for the given resource, or <code>null</code> if the resource is not contained in
  any export point