public static StructLikeMap<Long> readOptimizedSequence(KeyedTable table, long snapshotId) {
    return readWithLegacy(table.baseTable(), snapshotId, BLOB_TYPE_OPTIMIZED_SEQUENCE);
  }
Return the table root location of the mixed-format table.
amoro-format-iceberg/src/main/java/org/apache/amoro/utils/MixedTableUtil.java