presto-hive/src/main/java/io/prestosql/plugin/hive/HiveAnalyzeProperties.java/HiveAnalyzeProperties/getColumnNames
class HiveAnalyzeProperties:    public static Optional<Set<String>> getColumnNames(Map<String, Object> properties)
    {
        @SuppressWarnings("unchecked")
        Set<String> columns = (Set<String>) properties.get(COLUMNS_PROPERTY);
        return Optional.ofNullable(columns);
    }