code: public void visitSymlink(File link, String target, String relativePath) throws IOException {
          visit(link,relativePath);
      }
docs: Some visitors can handle symlinks as symlinks. Those visitors should implement
  this method to provide a different handling for symlink.
  <p>
  This method is invoked by those {@link DirScanner}s that can handle symlinks as symlinks.
  (Not every {@link DirScanner}s are capable of doing that, as proper symlink handling requires
  letting visitors decide whether or not to descend into a symlink directory.)