func (b Bytes) String() string {
	return units.CustomSize("%02.1f %s", float64(b), 1024.0, []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"})
}
String returns the string representation of bytes
package progress
import (
	"fmt"
	"time"
	units "github.com/docker/go-units"
)
type Bytes int64