con1.setEntityInstancePath(hhcell.getInstancePath());
con1.setType(ConnectionType.TO);
con1.setParent(hhcell);
con1.setName("Connection1");
hhcell.getConnections().add(con1);
VisualObjectReferenceNode visObj = new VisualObjectReferenceNode("Vis");
visObj.setAspectInstancePath(electrical.getInstancePath());
visObj.setVisualObjectId(sphere.getId());
TextMetadataNode text = new TextMetadataNode("Text");
text.setValue(new DoubleValue(2));
URLMetadataNode url = new URLMetadataNode("URL");
url.setValue(new DoubleValue(2));