public FastJsonConfig getFastJsonConfig() {
        return fastJsonConfig;
    }
Fastjson for Spring Data Redis Serializer.
<p>
Compatible fastjson 1.2.x

@author lihengming
@author Victor.Zxy
@see RedisSerializer
@since 2.0.2
fastjson1-compatible/src/main/java/com/alibaba/fastjson/support/spring/FastJsonRedisSerializer.java