private void ouputMetrics(T value, Object[] data) {
        if (sinkExactlyMetric != null) {
            sinkExactlyMetric.invoke(1, getDataSize(value), schemaUtils.getDataTime(data));
        }
    }
The map to store the start time of each checkpoint.
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/starrocks/src/main/java/org/apache/inlong/sort/starrocks/table/sink/table/StarRocksDynamicSinkFunctionV2.java