presto-main/src/main/java/io/prestosql/spiller/FileSingleStreamSpillerFactory.java/FileSingleStreamSpillerFactory/cleanupOldSpillFiles
class FileSingleStreamSpillerFactory:    @PostConstruct
    public void cleanupOldSpillFiles()
    {
        spillPaths.forEach(FileSingleStreamSpillerFactory::cleanupOldSpillFiles);
    }