public void delete(T row) throws IOException {
            if (!internalPosDelete(structProjection.wrap(asStructLike(row)))) {
                eqDeleteWriter.write(row);
            }
        }
Delete those rows whose equality fields has the same values with the given row. It will write
the entire row into the equality-delete file.

@param row the given row to delete.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/iceberg/src/main/java/org/apache/inlong/sort/iceberg/sink/trick/BaseTaskWriter.java