code: public void onMessage(MutateRowsResponse message) {
      for (Entry entry : message.getEntriesList()) {
        int index = (int) entry.getIndex();
  
        // Sanity check to make sure that the index returned from the server is valid.
        if (index >= mapToOriginalIndex.length || index < 0) {
          messageIsInvalid = true;
          break;
        }
  
        // Set the result.
        results[mapToOriginalIndex[index]] = entry.getStatus();
      }
    }
docs: Adds the content of the message to the {@link #results}.