protected Type getType(Type type, Class<?> contextClass) {
        if (Spring4TypeResolvableHelper.isSupport()) {
            return Spring4TypeResolvableHelper.getType(type, contextClass);
        }
        return type;
    }
@param fastJsonConfig the fastJsonConfig to set.
fastjson1-compatible/src/main/java/com/alibaba/fastjson/support/spring/FastJsonHttpMessageConverter.java