presto-hive/src/main/java/io/prestosql/plugin/hive/HiveTableProperties.java/HiveTableProperties/getHiveStorageFormat
class HiveTableProperties:    public static HiveStorageFormat getHiveStorageFormat(Map<String, Object> tableProperties)
    {
        return (HiveStorageFormat) tableProperties.get(STORAGE_FORMAT_PROPERTY);
    }