String relId = blip.getEmbed();
//Relationship r = diagramDataPart.getRelationshipsPart().getRelationshipByID(relId);
BinaryPartAbstractImage bpai = (BinaryPartAbstractImage)diagramDataPart.getRelationshipsPart().getPart(relId);
// Add it
Image image = factory.createSmartArtDataHierarchyImagesImage();
image.setContentType(bpai.getContentType());
image.setId(imgPt.getModelId());
image.setValue(bpai.getBytes());
images.getImage().add(image);
// reference
org.opendope.SmartArt.dataHierarchy.ImageRef imageRef = factory.createImageRef();