Iterator it = invocationHandler.callbackHandlers.iterator();
ServerInvokerCallbackHandler serverInvokerCallbackHandler = (ServerInvokerCallbackHandler) it.next();
Client callbackClient = serverInvokerCallbackHandler.getCallbackClient();
assertTrue(callbackClient.getInvoker() instanceof BisocketClientInvoker);
MicroSocketClientInvoker clientInvoker = (MicroSocketClientInvoker) callbackClient.getInvoker();
Field field = MicroSocketClientInvoker.class.getDeclaredField("pool");
field.setAccessible(true);
List pool = (List) field.get(clientInvoker);
field = MicroSocketClientInvoker.class.getDeclaredField("usedPooled");
field.setAccessible(true);