Struct DownloadInstanceInputOutputCallbacks 

pub struct DownloadInstanceInputOutputCallbacks {
    pub read: Option<Box<dyn FnMut(&mut [u8]) -> Option<usize>>>,
    pub write: Option<Box<dyn FnMut(&[u8]) -> usize>>,
    pub progress: Option<Box<dyn FnMut(usize, usize) -> bool>>,
}

Fields

read: Option<Box<dyn FnMut(&mut [u8]) -> Option<usize>>>

write: Option<Box<dyn FnMut(&[u8]) -> usize>>

progress: Option<Box<dyn FnMut(usize, usize) -> bool>>