@Override
    public void snapshotState(FunctionSnapshotContext context) {
    }
Sink function for converting upserts into Elasticsearch ActionRequests.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/elasticsearch-base/src/main/java/org/apache/inlong/sort/elasticsearch/table/MultipleElasticsearchSinkFunctionBase.java