use std::io; pub use prodash::progress::{Discard, DoOrDiscard, Either, ThroughputOnDrop};pub use prodash::{unit, Progress, Unit}; pub fn bytes() -> Option<Unit> {    Some(unit::dynamic_and_mode(        unit::Bytes,        unit::display::Mode::with_throughput().and_percentage(),    ))} pub fn count(name: &'static str) -> Option<Unit> {    Some(unit::dynamic_and_mode(        unit::Human::new(            {                let mut f = unit::human::Formatter::new();                f.with_decimals(1);                f            },            name,        ),        unit::display::Mode::with_throughput().and_percentage(),    ))} pub fn steps() -> Option<Unit> {    Some(unit::dynamic(unit::Range::new("steps")))} /// A structure passing every 'read' call through to the contained Progress instance using `inc_by(bytes_read)`.pub struct Read<R, P> {    pub reader: R,    pub progress: P,} impl<R, P> io::Read for Read<R, P>where    R: io::Read,    P: Progress,{    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {        let bytes_read = self.reader.read(buf)?;        self.progress.inc_by(bytes_read as usize);        Ok(bytes_read)    }}