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![image](https://user-images.githubusercontent.com/15622677/221121735-39571dc2-d771-493a-9d3c-14f8a8ee239f.png)
ReflectionPackableMethod类中 argument.getClass().getName()报空指针
            for (Object argument : arguments) {
                builder.addArgTypes(argument.getClass().getName());
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                multipleSerialization.serialize(url, serialize, argument.getClass(), argument, bos);
                builder.addArgs(bos.toByteArray());
            }
ReflectionPackableMethod reflectionPackableMethod = new ReflectionPackableMethod(
            methodDescriptor, url, serializeName);
        methodDescriptor.addAttribute(METHOD_ATTR_PACK, reflectionPackableMethod);
        return reflectionPackableMethod;
    }
    static boolean isStreamType(Class<?> type) {
        return StreamObserver.class.isAssignableFrom(type) || GRPC_STREAM_CLASS.equalsIgnoreCase(
            type.getName());
    }
    /**
     * Determine if the request and response instance should be wrapped in Protobuf wrapper object
     *
     * @return true if the request and response object is not generated by protobuf
     */
    static boolean needWrap(MethodDescriptor methodDescriptor, Class<?>[] parameterClasses,
                            Class<?> returnClass) {
        String methodName = methodDescriptor.getMethodName();
        
        if (CommonConstants.$INVOKE.equals(methodName) || CommonConstants.$INVOKE_ASYNC.equals(
            methodName)) {
            return true;
        }
        
        if ($ECHO.equals(methodName)) {
            return true;
        }
        boolean returnClassProtobuf = isProtobufClass(returnClass);
        
        if (parameterClasses.length == 0) {
            return !returnClassProtobuf;