@Bean
    public PluginDataHandler mqttPluginDataHandler() {
        return new MqttPluginDataHandler();
    }
Mqtt plugin data handler.

@return the plugin data handler
shenyu-spring-boot-starter/shenyu-spring-boot-starter-plugin/shenyu-spring-boot-starter-plugin-mqtt/src/main/java/org/apache/shenyu/springboot/starter/plugin/mqtt/MqttPluginConfiguration.java