code: private CmsUUID internalReadUUID(ObjectInput in) throws IOException {
  
          byte[] bytes = new byte[UUID_LENGTH];
          in.readFully(bytes, 0, UUID_LENGTH);
          return new CmsUUID(bytes);
      }
docs: Reads a UUID from an object input.<p>
  
  @param in the object input
  @return a UUID
  @throws IOException