* Initialize default structure of a new auto-shape
*
*/
protected static CTConnector prototype() {
if(prototype == null) {
CTConnector shape = CTConnector.Factory.newInstance();
CTConnectorNonVisual nv = shape.addNewNvCxnSpPr();
CTNonVisualDrawingProps nvp = nv.addNewCNvPr();
nvp.setId(1);
nvp.setName("Shape 1");
nv.addNewCNvCxnSpPr();
CTShapeProperties sp = shape.addNewSpPr();
CTTransform2D t2d = sp.addNewXfrm();
CTPositiveSize2D p1 = t2d.addNewExt();
p1.setCx(0);
p1.setCy(0);
CTPoint2D p2 = t2d.addNewOff();
p2.setX(0);
p2.setY(0);
CTPresetGeometry2D geom = sp.addNewPrstGeom();
geom.setPrst(STShapeType.LINE);
geom.addNewAvLst();
CTShapeStyle style = shape.addNewStyle();
CTSchemeColor scheme = style.addNewLnRef().addNewSchemeClr();
scheme.setVal(STSchemeColorVal.ACCENT_1);
style.getLnRef().setIdx(1);
CTStyleMatrixReference fillref = style.addNewFillRef();