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