code: @Override
    public void write (@Nonnull final String sStr, final int nOfs, final int nLen)
    {
      m_aSB.append (sStr.substring (nOfs, nOfs + nLen));
    }
docs: Write a portion of a string.
  
  @param sStr
  String to be written
  @param nOfs
  Offset from which to start writing characters
  @param nLen
  Number of characters to write