code: public void writeNestedLibrary(String destination, Library library)
  			throws IOException {
  		File file = library.getFile();
  		JarArchiveEntry entry = new JarArchiveEntry(destination + library.getName());
  		entry.setTime(getNestedLibraryTime(file));
  		new CrcAndSize(file).setupStoredEntry(entry);
  		writeEntry(entry, new InputStreamEntryWriter(new FileInputStream(file), true),
  				new LibraryUnpackHandler(library));
  	}
docs: Write a nested library.
  @param destination the destination of the library
  @param library the library
  @throws IOException if the write fails