public long getEmitDelay() {
        return emitDelay;
    }
The metric indicates delay from data generation to leaving the source operator.

<p>Note: the metric is available during the binlog phase. Use 0 to indicate the metric is
unavailable.</p>
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/debezium/internal/DebeziumChangeFetcher.java