Function link 

pub fn link<'life0, 'life1, 'life2, 'life3, 'life4, 'async_recursion>(
    prog_track: &'static Progress,
    cwd: &'life0 Path,
    src: &'life1 Path,
    dst: &'life2 Path,
    update: &'life3 Option<PathBuf>,
    settings: &'life4 Settings,
    is_fresh: bool,
) -> Pin<Box<dyn Future<Output = Result<Summary, Error>> + Send + 'async_recursion>>
where
    'static: 'async_recursion,
    'life0: 'async_recursion,
    'life1: 'async_recursion,
    'life2: 'async_recursion,
    'life3: 'async_recursion,
    'life4: 'async_recursion,