presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/util/SyncingFileSystem.java/LocalFileOutputStream/LocalFileOutputStream
class LocalFileOutputStream:        private LocalFileOutputStream(File file)
                throws IOException
        {
            this.file = requireNonNull(file, "file is null");
            this.out = new FileOutputStream(file);
        }