Struct CountIo 

pub struct CountIo<'a> {
    pub stdout: &'a mut dyn Write,
    pub stderr: &'a mut dyn Write,
    pub transport: &'a dyn Transport,
    pub store: &'a dyn CredStore,
    pub cache: &'a dyn ModelCache,
    pub clock: &'a dyn Clock,
}

The injected seams + writers for one bz --count-tokens — the sibling of ListIo, with a reader (the count op CONSUMES a request, unlike the listing verb). Reuses the data-plane Transport/CredStore/ModelCache/Clock: the model seed is placed against the same cache (READ-only — no write), and the one round-trip goes through the same Auth::apply. stdout gets the count; any error goes to stderr.

Fields

stdout: &'a mut dyn Write

stderr: &'a mut dyn Write

transport: &'a dyn Transport

store: &'a dyn CredStore

cache: &'a dyn ModelCache

clock: &'a dyn Clock