public String getTopic(String uid) {
        KafkaIdConfig idConfig = this.idConfigMap.get(uid);
        return Objects.isNull(idConfig) ? null : idConfig.getTopic();
    }
get Topic by uid

@param  uid uid
@return     topic
inlong-sort-standalone/sort-standalone-source/src/main/java/org/apache/inlong/sort/standalone/sink/kafka/KafkaFederationSinkContext.java