### Question:
DefaultHandlerRegistry implements HandlerRegistry { public Set<String> getSupportedRpcServices() { return Collections.unmodifiableSet(rpcOperations.keySet()); } @Inject  DefaultHandlerRegistry(Injector injector,
                                BeanJsonConverter beanJsonConverter,
                                HandlerExecutionListener executionListener); void addHandlers(Set<Object> handlers); RpcHandler getRpcHandler(JSONObject rpc); RestHandler getRestHandler(String path, String method); Set<String> getSupportedRestServices(); Set<String> getSupportedRpcServices();  }### Answer:
@Test public void testSupportedRpcServices() throws Exception { assertEquals(registry.getSupportedRpcServices(), Sets.newHashSet("test.create", "test.get", "test.overridden", "test.exception", "test.futureException", "test.override.rpcname", "test.echo", "test.noArg")); }