flink-cdc-connect/flink-cdc-source-connectors/flink-connector-db2-cdc/src/main/java/org/apache/flink/cdc/connectors/db2/source/fetch/Db2SourceFetchTaskContext.java [290:302]:
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        public Map<String, String> getEventSourcePosition(
                DataCollectionId source, OffsetContext offset, Object key, Struct value) {
            if (value == null) {
                return null;
            }
            final Struct sourceInfo = value.getStruct(FieldName.SOURCE);
            if (source == null) {
                return null;
            }
            return Collect.hashMapOf(
                    SourceInfo.COMMIT_LSN_KEY, sourceInfo.getString(SourceInfo.COMMIT_LSN_KEY),
                    SourceInfo.CHANGE_LSN_KEY, sourceInfo.getString(SourceInfo.CHANGE_LSN_KEY));
        }
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flink-cdc-connect/flink-cdc-source-connectors/flink-connector-sqlserver-cdc/src/main/java/org/apache/flink/cdc/connectors/sqlserver/source/reader/fetch/SqlServerSourceFetchTaskContext.java [303:315]:
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        public Map<String, String> getEventSourcePosition(
                DataCollectionId source, OffsetContext offset, Object key, Struct value) {
            if (value == null) {
                return null;
            }
            final Struct sourceInfo = value.getStruct(FieldName.SOURCE);
            if (source == null) {
                return null;
            }
            return Collect.hashMapOf(
                    SourceInfo.COMMIT_LSN_KEY, sourceInfo.getString(SourceInfo.COMMIT_LSN_KEY),
                    SourceInfo.CHANGE_LSN_KEY, sourceInfo.getString(SourceInfo.CHANGE_LSN_KEY));
        }
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