code: public void toPdf(PdfWriter writer, OutputStream os) throws IOException {
          if (bytes != null)
              os.write(bytes);
      }
docs: Writes the PDF representation of this <CODE>PdfObject</CODE> as an
  array of <CODE>byte</CODE>s to the writer.
  
  @param writer for backwards compatibility
  @param os     The <CODE>OutputStream</CODE> to write the bytes to.
  @throws IOException