static byte[] gunzipBinaryData(byte[] data) ctex {
  InputStream fis = new ByteArrayInputStream(data);
  GZIPInputStream gis = newGZIPInputStream(fis);
  ByteArrayOutputStream fos = new ByteArrayOutputStream();
  byte[] buffer = new byte[1024];
  int len;
  while((len = gis.read(buffer)) != -1){
      fos.write(buffer, 0, len);
  }
  fis.close();
  fos.close();
  return fos.toByteArray();
}

Began life as a copy of #1000679