code: public static boolean transformEntry(InputStream is, ZipEntryTransformerEntry entry, OutputStream os) {
      return transformEntries(is, new ZipEntryTransformerEntry[] { entry }, os);
    }
docs: Copies an existing ZIP file and transforms a given entry in it.
  
  @param is
  a ZIP input stream.
  @param entry
  transformer for a ZIP entry.
  @param os
  a ZIP output stream.
  @return <code>true</code> if the entry was replaced.