@Bean
    @ConditionalOnMissingBean(NacosDataChangedListener.class)
    public DataChangedListener nacosDataChangedListener(final ConfigService configService) {
        return new NacosDataChangedListener(configService);
    }
Data changed listener data changed listener.

@param configService the config service
@return the data changed listener
shenyu-admin-listener/shenyu-admin-listener-nacos/src/main/java/org/apache/shenyu/admin/config/NacosSyncConfiguration.java