code: protected boolean valuesEqual(byte[] oldValue, byte[] newValue) {
      return (oldValue == null && newValue == null)
          || (oldValue != null && newValue != null && Arrays.equals(oldValue, newValue));
    }
docs: Returns a boolean indicating whether the given entry values are equal.
  
  @param oldValue the first value to compare
  @param newValue the second value to compare
  @return indicates whether the two values are equal