public Builder<T> metricOption(MetricOption metricOption) {
            this.metricOption = metricOption;
            return this;
        }
metricOption used to instantiate SourceExactlyMetric when inlong.metric.labels is present in flink sql
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/sqlserver-cdc/src/main/java/org/apache/inlong/sort/sqlserver/SqlServerSource.java