Type Alias CbOption 

pub type CbOption = Option<Arc<dyn Fn(Result<(), &'static str>) + Send + Sync>>;

Describing optional batched callback function

Aliased Type

pub enum CbOption {
    None,
    Some(Arc<dyn Fn(Result<(), &'static str>) + Sync + Send>),
}

Variants

None

No value.

Some(Arc<dyn Fn(Result<(), &'static str>) + Sync + Send>)

Some value of type T.