public <T> PulsarSourceBuilder<OUT> setConfig(ConfigOption<T> key, T value) {
        configBuilder.set(key, value);
        return this;
    }
Set an arbitrary property for the PulsarSource and Pulsar Consumer. The valid keys can be
found in {@link PulsarSourceOptions} and {@link PulsarOptions}.

<p>Make sure the option could be set only once or with same value.

@param key the key of the property.
@param value the value of the property.
@return this PulsarSourceBuilder.
inlong-sort/sort-flink/sort-flink-v1.18/sort-connectors/pulsar/src/main/java/org/apache/inlong/sort/pulsar/source/PulsarSourceBuilder.java