code: public static boolean unpackEntry(InputStream is, String name, File file) throws IOException {
      return handle(is, name, new FileUnpacker(file));
    }
docs: Unpacks a single file from a ZIP stream to a file.
  
  @param is
  ZIP stream.
  @param name
  entry name.
  @param file
  target file to be created or overwritten.
  @return <code>true</code> if the entry was found and unpacked,
  <code>false</code> if the entry was not found.
  @throws java.io.IOException if file is not found or writing to it fails