presto-parquet/src/main/java/io/prestosql/parquet/ParquetCompressionUtils.java/ParquetCompressionUtils/decompressSnappy
class ParquetCompressionUtils:    private static Slice decompressSnappy(Slice input, int uncompressedSize)
    {
        byte[] buffer = new byte[uncompressedSize];
        decompress(new SnappyDecompressor(), input, 0, input.length(), buffer, 0);
        return wrappedBuffer(buffer);
    }