con2.setEntityInstancePath(purkinje.getInstancePath());
con2.setType(ConnectionType.FROM);
con2.setParent(purkinje);
purkinje.getConnections().add(con2);
SerializeTreeVisitor visitor = new SerializeTreeVisitor();
runtime.apply(visitor);
String serialized = visitor.getSerializedTree();
System.out.println(serialized);
Gson gson = new GsonBuilder().setPrettyPrinting().create();
JsonParser jp = new JsonParser();
JsonElement je = jp.parse(serialized);