Function spawn_with 

pub fn spawn_with(
    key: TypeId,
    name: &'static str,
    spec: LoadSpec<'static>,
    debounce: Duration,
    mode: WatchMode,
    reload: impl Fn() -> Result<Option<String>, Error> + Send + 'static,
) -> Result<WatchHandle>

Available on crate feature watch only.

spawn, with the detection strategy chosen explicitly.

Errors

As spawn.