private static CTSlide prototype(){
CTSlide ctSlide = CTSlide.Factory.newInstance();
CTCommonSlideData cSld = ctSlide.addNewCSld();
CTGroupShape spTree = cSld.addNewSpTree();
CTGroupShapeNonVisual nvGrpSpPr = spTree.addNewNvGrpSpPr();
CTNonVisualDrawingProps cnvPr = nvGrpSpPr.addNewCNvPr();
cnvPr.setId(1);
cnvPr.setName("");
nvGrpSpPr.addNewCNvGrpSpPr();
nvGrpSpPr.addNewNvPr();
CTGroupShapeProperties grpSpr = spTree.addNewGrpSpPr();
CTGroupTransform2D xfrm = grpSpr.addNewXfrm();
CTPoint2D off = xfrm.addNewOff();
off.setX(0);