protected Object[] getSingletons() {
// this test checks to make sure we can override system providers (JsonProvider) to establish a new priority
// last one listed takes priority
// (note: this test relies on consistent behavior in MockServletInvocationTest.getSingletons() -- if this
// method re-orders the data return from here, test results may change)
return new Object[] { new WinkJacksonJaxbJsonProvider(), new JsonProvider(),};
}