@Override
            public Object convert(GenericRowData root, int unused) {
                return metadata.converter.convert(root, pos);
            }
Creates A builder for building a {@link CanalJsonEnhancedDeserializationSchema}.
inlong-sort/sort-formats/format-row/format-json-v1.13/src/main/java/org/apache/inlong/sort/formats/json/canal/CanalJsonEnhancedDeserializationSchema.java