@Override
    public TypeInformation<RowData> getProducedType() {
        return resultTypeInfo;
    }
A wrapped output collector which is used to append metadata columns after physical columns.
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/mongodb-cdc/src/main/java/org/apache/inlong/sort/mongodb/MongoDBConnectorDeserializationSchema.java