presto-parquet/src/main/java/io/prestosql/parquet/reader/MetadataReader.java/MetadataReader/readFooter
class MetadataReader:    public static ParquetMetadata readFooter(FileSystem fileSystem, Path file, long fileSize)
            throws IOException
    {
        try (FSDataInputStream inputStream = fileSystem.open(file)) {
            return readFooter(inputStream, file, fileSize);
        }
    }