@Override
    public void close() {
        if (this.writeClient != null) {
            this.writeClient.close();
        }
    }
Constructs a StreamingSinkFunction.

@param config The config options
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/hudi/src/main/java/org/apache/inlong/sort/hudi/sink/StreamWriteFunction.java