private static PartitionSpec toPartitionSpec(List<String> partitionKeys, Schema icebergSchema) {
        PartitionSpec.Builder builder = PartitionSpec.builderFor(icebergSchema);
        partitionKeys.forEach(builder::identity);
        return builder.build();
    }
Append a new level to the base namespace
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/iceberg/src/main/java/org/apache/inlong/sort/iceberg/FlinkCatalog.java