flink-connector-elasticsearch-base/src/main/java/org/apache/flink/connector/elasticsearch/table/ElasticsearchConnectorOptions.java [94:106]:
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                    .withDescription("Backoff strategy");

    public static final ConfigOption<Integer> BULK_FLUSH_BACKOFF_MAX_RETRIES_OPTION =
            ConfigOptions.key("sink.bulk-flush.backoff.max-retries")
                    .intType()
                    .noDefaultValue()
                    .withDescription("Maximum number of retries.");

    public static final ConfigOption<Duration> BULK_FLUSH_BACKOFF_DELAY_OPTION =
            ConfigOptions.key("sink.bulk-flush.backoff.delay")
                    .durationType()
                    .noDefaultValue()
                    .withDescription("Delay between each backoff attempt.");
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flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/table/ElasticsearchConnectorOptions.java [127:139]:
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                    .withDescription("Backoff strategy");

    public static final ConfigOption<Integer> BULK_FLUSH_BACKOFF_MAX_RETRIES_OPTION =
            ConfigOptions.key("sink.bulk-flush.backoff.max-retries")
                    .intType()
                    .noDefaultValue()
                    .withDescription("Maximum number of retries.");

    public static final ConfigOption<Duration> BULK_FLUSH_BACKOFF_DELAY_OPTION =
            ConfigOptions.key("sink.bulk-flush.backoff.delay")
                    .durationType()
                    .noDefaultValue()
                    .withDescription("Delay between each backoff attempt.");
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