Function dispatch_to 

pub fn dispatch_to<U, W: Write>(
    env: &Env<'_>,
    root: &CmdSpec<'_, U>,
    argv: &[&str],
    user: &mut U,
    out: &mut W,
) -> Result<()>

Parse and dispatch starting from root using argv (not including program name), writing auto help/version/author output to out when triggered.

Errors

See Error