* @return a prototype that is used to construct new shapes
*/
protected static CTPicture prototype(){
if(prototype == null) {
CTPicture pic = CTPicture.Factory.newInstance();
CTPictureNonVisual nvpr = pic.addNewNvPicPr();
CTNonVisualDrawingProps nvProps = nvpr.addNewCNvPr();
nvProps.setId(1);
nvProps.setName("Picture 1");
nvProps.setDescr("Picture");
CTNonVisualPictureProperties nvPicProps = nvpr.addNewCNvPicPr();