public PulsarSourceBuilder<OUT> setSubscriptionName(String subscriptionName) {
        return setConfig(PULSAR_SUBSCRIPTION_NAME, subscriptionName);
    }
Sets the name for this pulsar subscription.

@param subscriptionName the server url of the Pulsar cluster.
@return this PulsarSourceBuilder.
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/pulsar/src/main/java/org/apache/inlong/sort/pulsar/source/PulsarSourceBuilder.java