I didn' recognize that I've got a private reply on this. So here is
the solution...
if you define your persist method with
public Employee persist() { .... }
and return the new persisted employee object you can modify your
requestFactory interface with
InstanceRequest<EmployeeProxy, EmployeeProxy> persist();
instead of
InstanceRequest<EmployeeProxy, Void> persist();
This way you retrieve the newly persisted object through the
requestfactory.