xslf： pictureShape copy cannot deal with SVG copying

// TODO: check for SVG copying
CTOfficeArtExtensionList extLst = blip.getExtLst();
for(CTOfficeArtExtension ext : extLst.getExtArray()){
String xpath = "declare namespace a14='"+ MS_DML_NS +"' $this//a14:imgProps/a14:imgLayer";
XmlObject[] obj = ext.selectPath(xpath);
if(obj != null && obj.length == 1) {
try (XmlCursor c = obj[0].newCursor()) {
String id = c.getAttributeText(EMBED_TAG);
String newId = getSheet().importBlip(id, p.getSheet());
c.setAttributeText(EMBED_TAG, newId);
}
}
}

Search the XSLF picture-shape copy path for the shown SVG TODO and inspect the loop around blip.getExtLst(), including getSheet().importBlip(id, p.getSheet()). Reproduce an SVG copy case and compare the copied extension data; done means SVG images copy successfully without leaving the original embedded id.

Written by the indexing model from the issue text.