code: protected byte[] convertContent(String source, String destination, byte[] content, String resType) {
  
          // if the import is older than version 3, some additional conversions must be made
          if (getVersion() < 3) {
              if ("page".equals(resType)) {
                  // if the imported resource is a page, store its path inside the VFS for later
                  // integration with its body
                  m_pageStorage.add(destination);
              } else if ("folder".equals(resType)) {
                  // check if the imported resource is a folder. Folders created in the /system/bodies/ folder
                  if (destination.startsWith(VFS_PATH_BODIES.substring(1))) {
                      // must be removed since we do not use body files anymore.
                      m_folderStorage.add(destination);
                  }
              }
          }
  
          return content;
      }
docs: Performs all required pre-import steps.<p>
  
  The content is *NOT* changed in the implementation of this class.<p>
  
  @param source the source path of the resource
  @param destination the destination path of the resource
  @param content the content of the resource
  @param resType the type of the resource
  @return the (prepared) content of the resource