private void extractContent(StringBuilder buffy, XMLSlideShow xmlSlideShow) throws IOException, XmlException {
XSLFSlide[] slides = xmlSlideShow.getSlides();
for (XSLFSlide slide : slides) {
CTSlide rawSlide = slide._getCTSlide();
CTSlideIdListEntry slideId = slide._getCTSlideId();
CTNotesSlide notes = xmlSlideShow._getXSLFSlideShow().getNotes(slideId);
CTCommentList comments = xmlSlideShow._getXSLFSlideShow().getSlideComments(slideId);
extractShapeContent(buffy, rawSlide.getCSld().getSpTree());