code: PdfStream getFormXObject(int compressionLevel) throws IOException {
          PdfStream s = new PdfStream(content.toByteArray());
          s.put(PdfName.TYPE, PdfName.XOBJECT);
          s.put(PdfName.SUBTYPE, PdfName.PS);
          s.flateCompress(compressionLevel);
          return s;
      }
docs: Gets the stream representing this object.
  
  @param	compressionLevel	the compressionLevel
  @return the stream representing this template
  @since	2.1.3	(replacing the method without param compressionLevel)
  @throws IOException