presto-kudu/src/main/java/io/prestosql/plugin/kudu/properties/KuduTableProperties.java/KuduTableProperties/getColumns
class KuduTableProperties:    private static LinkedHashMap<String, ColumnDesign> getColumns(KuduTable table)
    {
        Schema schema = table.getSchema();
        LinkedHashMap<String, ColumnDesign> columns = new LinkedHashMap<>();
        for (ColumnSchema columnSchema : schema.getColumns()) {
            ColumnDesign design = new ColumnDesign();
            design.setNullable(columnSchema.isNullable());
            design.setPrimaryKey(columnSchema.isKey());
            design.setCompression(lookupCompressionString(columnSchema.getCompressionAlgorithm()));
            design.setEncoding(lookupEncodingString(columnSchema.getEncoding()));
            columns.put(columnSchema.getName(), design);
        }
        return columns;
    }