code: public void drawGroup(Object parent, Object object) {
  		if (isAttached()) {
  			helper.createOrUpdateGroup(parent, object, null, null);
  		}
  	}
docs: Creates a group element in the technology (SVG/VML/...) of this context. A group is meant to group other elements
  together.
  
  @param parent
  parent group object
  @param object
  group object