@Override
		public int hashCode() {
			int result = Objects.hash(
				index,
				docType,
				keyDelimiter,
				keyNullLiteral,
				serializationSchema,
				contentType,
				requestFactory);
			result = 31 * result + Arrays.hashCode(keyFieldIndices);
			return result;
		}
Sink function for converting upserts into Elasticsearch {@link ActionRequest}s.
elasticsearch5-xh/elasticsearch5-xh-sink/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchUpsertTableSinkBase.java