presto-iceberg/src/main/java/io/prestosql/plugin/iceberg/IcebergTableProperties.java/IcebergTableProperties/getPartitioning
class IcebergTableProperties:    @SuppressWarnings("unchecked")
    public static List<String> getPartitioning(Map<String, Object> tableProperties)
    {
        List<String> partitioning = (List<String>) tableProperties.get(PARTITIONING_PROPERTY);
        return partitioning == null ? ImmutableList.of() : ImmutableList.copyOf(partitioning);
    }