parquetFormat = "parquet"
)

// CompressionType - represents value inside <CompressionType/> in request XML.
type CompressionType string

const (
	noneType  CompressionType = "none"
	gzipType  CompressionType = "GZIP"
	bzip2Type CompressionType = "BZIP2"

	zstdType   CompressionType = "ZSTD"
	lz4Type    CompressionType = "LZ4"
	s2Type     CompressionType = "S2"
	snappyType CompressionType = "SNAPPY"
)

	if pr == nil {
		return 0, 0
	}
	return pr.scannedReader.BytesRead(), pr.processedReader.BytesRead()
}

func newProgressReader(rc io.ReadCloser, compType CompressionType) (*progressReader, error) {
	if rc == nil {
		return nil, errors.New("newProgressReader: nil reader provided")
	}
	scannedReader := newCountUpReader(rc)
	pr := progressReader{
		rc:            rc,