presto-main/src/main/java/io/prestosql/metadata/MetadataUtil.java/TableMetadataBuilder/hiddenColumn
class TableMetadataBuilder:        public TableMetadataBuilder hiddenColumn(String columnName, Type type)
        {
            columns.add(ColumnMetadata.builder()
                    .setName(columnName)
                    .setType(type)
                    .setHidden(true)
                    .build());
            return this;
        }