docs: @Override
      public FileBuilder addSymbolicLink(Path target, Path linkTarget) throws IOException
      {
          checkTarget(target);
          checkTarget(linkTarget);
          FileBuilder fb = new FileBuilder();
          fb.target = target;
          fb.linkTo = linkTarget;
          fb.content = ByteBuffer.wrap(PathHelper.posixString(linkTarget).getBytes(US_ASCII));
          fb.size = fb.content.limit();
          fb.mode = (short) 0120000;
          fb.compressFilename();
          fileBuilders.add(fb);
          return fb;
      }